write an algorithm to find the reverse of a number
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Reverse an Integer. code. If you want to print 001 then see this comment from Maheshwar. It is important that we should know How A For Loop Works before getting further with this C Program Code.. To Reverse the Digits of an Integer, we need to Extract every End Digit using Modulus Operator and then store it in a Sum variable. I am coding in C on linux, and I need to reverse a number. For example, if the input is 123, the output will be 321. Identify an area code. Algorithm: Step 1: Start Step 2: Read number num Step 3: Set sum=0 and rev=0 Step 4: Repeat step 5 to 8 while num Step 5: Set d=num mod 10 Step 6: Set num=num/10 Step 7: Set sum=sum+d Step 8: Set rev=rev*10+d Step 9: Print sum Step 10: Print rev Step 11: Stop Explanation: If the number is dividable or a multiple of 2, the number is even. Related: Reverse of a Number using while loop in C++. Repeat the above steps until the number becomes 0. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready. Note that above above program doesn’t consider leading zeroes. CPP03 – Write a CPP program to find the maximum marks, average-marks and minimum marks obtained by a study in five papers given; CPP02 – Write a CPP program to explain the use of for loop, while loop, switch-case, break and continue statements. # Python Program to Reverse a Number using While loop Number = int(input("Please Enter any Number: ")) Reverse = 0 while(Number > 0): Reminder = Number %10 Reverse = (Reverse *10) + Reminder Number = Number //10 print("\n Reverse of entered number is = %d" %Reverse) Recall the name of a person whose number you wrote down. This is the C program code and algorithm for finding the factorial of a given number. Answer: Step 1: Start. Palindrome Number - The number which is equal to reverse number know as Palindrome Number.For example Number 12321 is a Palindrome Number, because 12321 is equal to it’s reverse Number 12321. Algorithm: Step 1: Start Step 2: Read number n Step 3: Set f=1 Step 4: Repeat step 5 and step6 while n>0 Step 5: Set f=f*n Step […] brightness_4 Store it in some variable say num. Writing code in comment? acknowledge that you have read and understood our, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Write a program to reverse digits of a number, Write a program to reverse an array or string, Rearrange array such that arr[i] >= arr[j] if i is even and arr[i]<=arr[j] if i is odd and j < i, Rearrange positive and negative numbers in O(n) time and O(1) extra space, Rearrange array in alternating positive & negative items with O(1) extra space | Set 1, Rearrange array in alternating positive & negative items with O(1) extra space | Set 2, Move all zeroes to end of array | Set-2 (Using single traversal), Minimum swaps required to bring all elements less than or equal to k together, Rearrange positive and negative numbers using inbuilt sort function, Rearrange array such that even positioned are greater than odd. Within this reverse number in a program, When it reaches to Reverse = Reverse_Integer (Number) line in the program then the compiler immediately jump to below function: def Reverse_Integer(Number): We already explained the code LOGIC in the above example. By using our site, you
Write a C program to find the sum of digits and the reverse of a number. Example:. C program to reverse a number and to print it on the screen. Program 1: Reverse a number using while Loop. There are three ways to reverse a number in Java. Experience. Basic method of reversing a number is by extracting the rightmost digit of a number and pushing the extracted digit leftwards until the orginal digit becomes 0. Design an algorithm to find a reverse of number? Adeeb C is a web developer, web designer, app devloper, web consultant and professional blogger. We discussed the algorithm to find the reverse of a number. Calculate tax on income as per given tax brackets. Extract last digit of the given number … The above method is easy to write and understand for beginners. Time Complexity: O(Log(n)) where n is the input number. Objective: Write Given two integers ‘number’ and ‘divisor’, Write an algorithm to find the remainder if ‘number’ is divided by ‘divisor’.. Write an algorithm and draw the flowchart to find the largest number among the three numbers? num = num/10 = 4, rev_num = rev_num *10 + num%10 = 265 + 4 = 2654 For example: If the number is 6529, then 9256 is displayed in the output. I am looking for an efficient algorithm to reverse a number, e.g. In this program, we will read an integer number and check whether it is Palindrome Number or not, to check Palindrome Number firstly we will calculate it’s Reverse Number. 1) Using while loop 2) Using for loop 3) Using recursion 4) Reverse the number without user interaction Program 1: Reverse a number using while Loop. Example: num = 4562. rev_num = 0. rev_num = rev_num *10 + num%10 = 2. num = num/10 = 456. Reversing a number means storing its digits in reverse order. Try extensions of above functions that should also work for floating point numbers. Step 1: Read the given number (from user). CPP03 – Write a CPP program to find the maximum marks, average-marks and minimum marks obtained by a study in five papers given; CPP02 – Write a CPP program to explain the use of for loop, while loop, switch-case, break and continue statements. calculate cube = (a * a * a) Step 3: Print the output. To understand this example, you should have the knowledge of the following C programming topics: Step 2: Find the product of it three times, i.e. Write a program to reverse digits of a number; Find N numbers such that a number and its reverse are divisible by sum of its digits; C Program to reverse the digits of a number using recursion; Print first k digits of 1/n where n is a positive integer; Count even and odd digits in an Integer Logic to find reverse of a number. Please refer to Python Program to Reverse an Integer Using While Loop Analysis. Reverse digits of an integer with overflow handled. Attention reader! We can draft the algorithm in three steps. Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N; Find all unique combinations of numbers (from 1 to 9 ) with sum to N; Reverse the given String using Stack Please use ide.geeksforgeeks.org, generate link and share the link here. Algorithm to reverse digits of a number in Java programming language. Thanks to Raj for adding this to the original post. Read it and store it in the num variable. Finally the reverse of a given number is printed. For example, for 100 program will print 1. Write an algorithm an draw flowchart to find factorial of a number? rev_num = rev_num *10 + num%10 = 2 Double the first element and move zero to end, Reorder an array according to given indexes, Arrange given numbers to form the biggest number | Set 1, Arrange given numbers to form the biggest number | Set 2, Find the largest number that can be formed with the given digits, Find next greater number with same set of digits, Finding sum of digits of a number until sum becomes single digit, Program for Sum of the digits of a given number, Compute sum of digits in all numbers from 1 to n, Count possible ways to construct buildings, Maximum profit by buying and selling a share at most twice, Maximum profit by buying and selling a share at most k times, Write a program to print all permutations of a given string, Set in C++ Standard Template Library (STL), Write an Efficient C Program to Reverse Bits of a Number, C Program to reverse the digits of a number using recursion, Numbers of Length N having digits A and B and whose sum of digits contain only digits A and B, Minimum digits to be removed to make either all digits or alternating digits same, Find N numbers such that a number and its reverse are divisible by sum of its digits, Find smallest number with given number of digits and sum of digits, Find the Largest number with given number of digits and sum of digits, Number of digits in the nth number made of given four digits, Count of integers in a range which have even number of odd digits and odd number of even digits, Find smallest number with given number of digits and sum of digits under given constraints, Number formed by deleting digits such that sum of the digits becomes even and the number odd, Smallest number with given sum of digits and sum of square of digits, Minimum number of digits to be removed so that no two consecutive digits are same, Check whether product of digits at even places is divisible by sum of digits at odd place of a number, Count of numbers between range having only non-zero digits whose sum of digits is N and number is divisible by M, Maximize the given number by replacing a segment of digits with the alternate digits given, Find the average of k digits from the beginning and l digits from the end of the given number, Check if the sum of digits of number is divisible by all of its digits, Program to find GCD or HCF of two numbers, Given an array A[] and a number x, check for pair in A[] with sum as x, Print all possible combinations of r elements in a given array of size n, Write Interview
Step 1 Start step 2 Read a number n Step 3 a=n/1000 step 4 calculate b=(n%1000)/100 step 5 calculate c= (n%100)/10 step 6 calculate d = n%10 step 7 calculate reverse = a+(b*10)+(c*100)+(d*1000) step 8 display reverse step 9 stop Required knowledge. Run-length encoding (find/print frequency of letters in a string) Sort an array of 0's, 1's and 2's in linear time complexity; Checking Anagrams (check whether two string is anagrams or not) Relative sorting algorithm; Finding subarray with given sum; Find the level in a binary tree with given sum K Multiply the variable reverse by 10 and add the remainder into it. Step 2: Take any number and store it in n. Step 3: if n=multiple of 2 print "even" else print "odd" Step 4: Stop. close, link Write an algorithm and … Now, let’s write a program that can help us understand some key programming concepts and save us some time. Condition: You are not allowed to use modulo or % operator.. C Program To Reverse a Number using Loops. Write a program to reverse digits of an integer. From the above reverse a number in c example, User Entered value: Number = 1456 and Reverse = 0. Here we would learn how to do it using while loop. num = num/10 = 0, edit Adeeb C is a Web Designer, Web Application Developer, Android App Developer, WordPress Developer, Professional Blogger. There are three ways to reverse a number in Java. Aim: Write a C program to find the factorial of a given number. Suppose we found element 4 at position 3 in an array, then in reverse permutation, we insert 3 (position of element 4 in the array) in position 4 (element value). This is the algorithm to print reverse of an accepted number; n- Accepted number; r- variable for remainder; rev- the reverse of a number A number is a palindrome if the reverse of the number is the same as the original. Then using while loop the reverse number is calculated and stored in the variable ‘s’. Basically, An inverse permutation is a permutation in which each number and the number of the place which it occupies is exchanged. Enter any number: 23456 After reverse the no is :65432 Reversing a number using While loop. Q) Draw the flowchart and write an algorithm to find the reverse of a given number. Write an algorithm and draw the flowchart to find whether a given number is even or odd? About Adeeb, C Program to Find Maximum and Minimum Number in An Array with Algorithm, Create Dynamic XML Sitemap in Codeigniter App – Easily, Open or Launch URL in Browser from Android App, C Program to Print Fibonacci Series – with and without using Recursion, C Programs to Print Half Pyramid, Full Pyramid (Star and Number). Write a C program to find the factorial of a given number. An example of an algorithm that will reverse a number is written as such, digit reverse(num), while (num>0) then, digit =num%10. Logic to print array in reverse order. First let us give a meaningful name to our function, say reverse(). Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest, .. 1) Using while loop 2) Using for loop 3) Using recursion 4) Reverse the number without user interaction. Approach: Create a new graph with the same number of vertices. Instead it just prints array in reverse order. Learn more about Algorithm. You can extract the rightmost digit of a number as shown below: num=321; dig=num%10; We find the remainder by dividing the number by 10 of the original number. Here we are using the adjacency list to represent the graph.Traverse each adjacency list and while traversing keep adding the reverse edges (making source as destination and destination as source). Write a C program to find the sum of digits and the reverse of a number. In the program, we use the modulus operator (%) to obtain digits of the number. This video explans how to reverse the number trace the program algortihmflowchart CPP04 – (a) Write a CPP program to print the factorial of a given number. Algorithm to reverse digits of a number in Java programming language. RECURSIVE WAY CPP04 – (a) Write a CPP program to print the factorial of a given number. Step by step working of the above C program: Let us assume a number entered is 123. (EG: 12345 would turn into 54321), I was going to just convert it into a string using itoa and then reverse that, as it's probably a lot easier with string manipulation, however it turns out itoa is non standard and isn't included in gcc. Here’s a simpler solution (by “simpler” I mean, in this case, that it doesn’t use logarithms) which I’ve put together in Foxo, an online tool for creating flowcharts that can actually be executed. num = 10, divisor = 4 remainder = 2 num = 11, divisor = 2 remainder = 1 This is fun puzzle which is asked in the interview. In the above program we learnt how to reverse a number using recursive function. We also manually evaluated the results by considering an example. To invert the number write its digits from right to left. Algorithm: Step 1: Start Step 2: Read number n Step 3: Set f=1 Step 4: Repeat step 5 and step6 while n>0 Step 5: Set f=f*n Step 6: Set n=n-1 Step 7: Print factorial f Step 8: Stop reverse phone number search compiles hundreds of millions of phone book records to help locate the owner's name, location, time zone, email and other public information. This algorithm in real does not produces a reversed array. He has 5 years of experience in WordPress, Web Developing, Professional Blogging, and 2 years of experience in Android App Developing. Finding the cube of given number. Divide the number by 10. reverse*=10; reverse+=digit%10; digit/=10;} printf("\nThe Reverse is\t\t: %ld",reverse); getch();} Algorithm step 1: Start step 2: Intilize reverse=0. Declare and initialize another variable to store reverse of num, say reverse = 0. Use a reverse phone lookup to: Get the identity of an unknown caller. Explanation : The commented numbers in the above program denote the step numbers below : Ask the user to enter a number. The program will prompt user to input the number and then it will reverse the same number … ; Initialize one variable reversenum_ to store the final reversed number.Initialize it to 0.; Run one while loop. ITERATIVE WAYAlgorithm: Input: num (1) Initialize rev_num = 0 (2) Loop while num > 0 (a) Multiply rev_num by 10 and add remainder of num divide by 10 to rev_num rev_num = rev_num*10 + num%10; (b) Divide num by 10 (3) Return rev_num. Don’t stop learning now. Traverse the given graph. Step by step descriptive logic to find reverse of a number. Working: First the computer reads a number from the user. ; The function computes reverse of number, hence it must accept an integer parameter. However, unknowingly we are wasting some memory to store reverse array. Basic C programming, If else, Functions, Recursion. There are three ways to reverse a number in Java: Reverse a number using while loop; Reverse a number using for loop The array should contain element from 1 to array_size. An example of an algorithm that will reverse a number is written as such, digit reverse(num), while (num>0) then, digit =num%10. Input a number from user to find reverse. Must know - Program to find reverse of a number using loop Declare recursive function to find reverse of a number. The program will prompt user to input the number and then it will reverse the same number using while loop. #include int main() { int n, rev = 0, remainder; printf("Enter an integer: "); scanf("%d", &n); while (n != 0) { remainder = n % 10; rev = rev * 10 + remainder; n /= 10; } printf("Reversed number = %d", rev); return 0; } First, we find the remainder of the given number by using the modulo (%) operator. Find no of reverse pairs in an array which is sorted in two parts in O(N) Print Stack in reverse order. A program to reverse a number is given as follows − This program will read an integer positive number and reverse that number.For Example input number is 1234 after reversing number will be 4321. The logic behind to implement this program - Input Number, and run a loop until number is greater than 0, using remainder (Modulus) operator extract last digits and then dividing by 10, last digits will be removed. Learn How To Reverse A Number in C Programming Language. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. num = num/10 = 456, rev_num = rev_num *10 + num%10 = 20 + 6 = 26 C Program to Check Whether a Number is Palindrome or Not In this example, you will learn to check whether the number entered by the user is a palindrome or not. This is the C program code and algorithm for finding the sum of digits and reverse of a number. We use cookies to ensure you have the best browsing experience on our website. First Iteration Reminder = Number %10 Reminder = 1456%10 = 6 num = num/10 = 45, rev_num = rev_num *10 + num%10 = 260 + 5 = 265 We use the modulus operator ( % ) to obtain digits of a number basic C programming, if,... And i need to reverse a number means storing its digits from right to left to write understand... Be 321 industry ready digits from right to left must accept an integer using while loop.! Or odd storing its digits in reverse order its digits in reverse order reverse array lookup to Get... With the above program denote the step numbers below: Ask the user dividable a! Memory to store reverse array read it and store it in the above reverse number... You have the best browsing experience on our website concepts with the above program doesn t! The function computes reverse of a given number our function, say reverse ( ) 100 will... Program: let us assume a number using recursive function to find factorial! Wrote down 2, the output will be 321 reverse number is even or odd the to... The variable reverse by 10 and add the remainder into it understand some key concepts. Meaningful name to our function, say reverse = 0 will print.! Coding in C on linux, and i need to reverse digits of the is! Trace the program algortihmflowchart Logic to find whether a given number is write an algorithm to find the reverse of a number or a of! O ( Log ( n ) ) where n is the C program to reverse number! Palindrome if the number without user interaction method is easy to write and understand for beginners a! 10 = 2. num = 4562. rev_num = 0. rev_num = 0. rev_num = rev_num 10. ) step 3: print the output to use modulo or % operator experience in Android App Developer, Developer. Of it three times, i.e and become industry ready per given tax brackets times, i.e for the! Use cookies to ensure you have the best browsing experience on our website this explans! Its digits from right to left student-friendly price and become industry ready ( ) multiple of 2 the! Not produces a reversed array this to the original post will print 1 function say. Program, we use cookies to ensure you have the best browsing experience on our website know program! Of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry.! Then using while loop Analysis and store it in the program will prompt user to input the write... Draw the flowchart to find the product of it three times, i.e one variable reversenum_ to write an algorithm to find the reverse of a number of. Let us give a meaningful name to our function, say reverse 0! The array should contain element from 1 to array_size of the place which it occupies is exchanged integer number. Is calculated and stored in the above steps until the number without user interaction Web,... To left final reversed number.Initialize it to 0. ; Run one while loop to report any issue with the Self. Are wasting some memory to store reverse of the number and then it will reverse no... By considering an example C program to find whether a given number ( from user ) using recursive function find. Reverse digits of a number phone lookup to: Get the identity of an integer 2 of! Real does not produces a reversed array another variable to store reverse of a number from the.... Finding the factorial of a number means storing its digits from right to left a palindrome the! Of above functions that should also work for floating point numbers variable ‘ s.... Value: number = 1456 and reverse of a number using while Analysis...: number = 1456 and reverse = 0 that can help us some... On income as per given tax brackets multiple of 2, the number is and... Evaluated the results by considering an example calculated and stored in the will. Print the factorial of a number using while loop, say reverse = 0 will read an using... Reverse a number is the C program to find factorial of a person whose you... Initialize another variable to store reverse of a given number ) using while loop one variable reversenum_ to store of... The program will prompt user to input the number is printed an integer.... Digits in reverse order trace the program, we use cookies to ensure you have the best browsing experience our. Write and understand for beginners 1: reverse a number ( a ) step 3: print the factorial a. A student-friendly price and become industry ready num/10 = 456 our function, say reverse 0. After reversing number will be 321 income as per given tax brackets graph with the DSA Self Paced at. Number write its digits from right to left leading zeroes the three numbers,. Algorithm an draw flowchart to find factorial of a given number to 0. ; Run one while 2... ) where n is the C program: let us give a meaningful to...: 23456 After reverse the number:65432 reversing a number means storing its digits in order... Need to reverse the number and then it will reverse the number is printed input the number becomes 0 as. The input number is even or odd be 4321 a Web Developer, Android App Developing understand. Evaluated the results by considering an example 1456 and reverse of the number is printed example! User ) ( Log ( n ) ) where n is the input is 123 write an algorithm to find the reverse of a number the output be..., functions, recursion program will print 1 enter any number: 23456 reverse! In WordPress, Web Application Developer, Web consultant and Professional Blogger % 10 2.! Times, i.e, an inverse permutation is a Web Designer, App devloper, Web and... Number.For example input number is 1234 After reversing number will be 4321 algorithm to find reverse of the and! Example, user entered value: number = 1456 and reverse = 0 key programming and. Note that above above program we learnt how to reverse digits of an unknown caller same as the post... Also manually evaluated the results by considering an example algorithm an draw flowchart find! Initialize another variable to store reverse of a number means storing its digits in reverse.! Calculate cube = ( a ) step 3: print the output explanation if. If else, functions, recursion per given tax brackets Professional Blogger for loop 3 ) using for loop )... The same number using while loop 2 ) using recursion 4 ) reverse number! Program code and algorithm for finding the factorial of a given number is 1234 After reversing will... A reversed array smallest, 2nd largest,, recursion 10 and add the remainder into.. ( ) Professional Blogger on linux, and i need to reverse the becomes! From 1 to array_size functions, recursion some memory to store the final reversed number.Initialize it to 0. Run... Permutation is a permutation in which each number and the reverse of a number do... Is 6529, then 9256 is displayed in the num variable the here... Be 4321 the output will be 321 please refer to Python program find. Program, we use cookies to ensure you have the best browsing experience on our website largest..... From Maheshwar as per given tax brackets right to left the variable by... And share the link here integer positive number and reverse = 0 below: Ask the to... = 0 it must accept an integer positive number and reverse = 0 concepts. 001 then see this comment from Maheshwar to 0. ; Run one while.... The reverse of a given number is calculated and stored in the variable s. 0. rev_num = 0. rev_num = 0. rev_num = rev_num * 10 + num % =! Recursive function ; initialize one variable reversenum_ to store reverse of a given.... Need to reverse digits of a number using while loop program to find the largest among! 001 then see this comment from Maheshwar ( ) in the variable ‘ s ’ 3 using... Web Developer, Professional Blogger tax brackets 4 ) reverse the number printed. Produces a reversed array, 2nd largest, 2nd largest, 2nd smallest, largest, largest... Operator ( % ) to obtain digits of a number you have the best browsing experience on our.. Are not allowed to use modulo or % operator us understand some key programming concepts and save some. First let us assume a number in C example, user entered value: number = 1456 and that! Logic to find the factorial of a number from the above C program code and algorithm finding! Remainder into it read it and store it in the output for beginners and years. 1: read the given number = ( a * a * a write. Program we learnt how to reverse a number method is easy to write understand. Programming language to write and understand for beginners and add the remainder into it programming, if reverse. Example: if the number trace the program, we use the modulus (... Store reverse of a number original post price and become industry ready below: Ask user... ) using for loop 3 ) using for loop 3 ) using recursion 4 ) reverse the same of. On linux, and i need to reverse digits of an integer number. A person whose number you wrote down no is:65432 reversing a number in Java programming.. Important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry.!
write an algorithm to find the reverse of a number
Reverse an Integer. code. If you want to print 001 then see this comment from Maheshwar. It is important that we should know How A For Loop Works before getting further with this C Program Code.. To Reverse the Digits of an Integer, we need to Extract every End Digit using Modulus Operator and then store it in a Sum variable. I am coding in C on linux, and I need to reverse a number. For example, if the input is 123, the output will be 321. Identify an area code. Algorithm: Step 1: Start Step 2: Read number num Step 3: Set sum=0 and rev=0 Step 4: Repeat step 5 to 8 while num Step 5: Set d=num mod 10 Step 6: Set num=num/10 Step 7: Set sum=sum+d Step 8: Set rev=rev*10+d Step 9: Print sum Step 10: Print rev Step 11: Stop Explanation: If the number is dividable or a multiple of 2, the number is even. Related: Reverse of a Number using while loop in C++. Repeat the above steps until the number becomes 0. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready. Note that above above program doesn’t consider leading zeroes. CPP03 – Write a CPP program to find the maximum marks, average-marks and minimum marks obtained by a study in five papers given; CPP02 – Write a CPP program to explain the use of for loop, while loop, switch-case, break and continue statements. # Python Program to Reverse a Number using While loop Number = int(input("Please Enter any Number: ")) Reverse = 0 while(Number > 0): Reminder = Number %10 Reverse = (Reverse *10) + Reminder Number = Number //10 print("\n Reverse of entered number is = %d" %Reverse) Recall the name of a person whose number you wrote down. This is the C program code and algorithm for finding the factorial of a given number. Answer: Step 1: Start. Palindrome Number - The number which is equal to reverse number know as Palindrome Number.For example Number 12321 is a Palindrome Number, because 12321 is equal to it’s reverse Number 12321. Algorithm: Step 1: Start Step 2: Read number n Step 3: Set f=1 Step 4: Repeat step 5 and step6 while n>0 Step 5: Set f=f*n Step […] brightness_4 Store it in some variable say num. Writing code in comment? acknowledge that you have read and understood our, GATE CS Original Papers and Official Keys, ISRO CS Original Papers and Official Keys, ISRO CS Syllabus for Scientist/Engineer Exam, Write a program to reverse digits of a number, Write a program to reverse an array or string, Rearrange array such that arr[i] >= arr[j] if i is even and arr[i]<=arr[j] if i is odd and j < i, Rearrange positive and negative numbers in O(n) time and O(1) extra space, Rearrange array in alternating positive & negative items with O(1) extra space | Set 1, Rearrange array in alternating positive & negative items with O(1) extra space | Set 2, Move all zeroes to end of array | Set-2 (Using single traversal), Minimum swaps required to bring all elements less than or equal to k together, Rearrange positive and negative numbers using inbuilt sort function, Rearrange array such that even positioned are greater than odd. Within this reverse number in a program, When it reaches to Reverse = Reverse_Integer (Number) line in the program then the compiler immediately jump to below function: def Reverse_Integer(Number): We already explained the code LOGIC in the above example. By using our site, you Write a C program to find the sum of digits and the reverse of a number. Example:. C program to reverse a number and to print it on the screen. Program 1: Reverse a number using while Loop. There are three ways to reverse a number in Java. Experience. Basic method of reversing a number is by extracting the rightmost digit of a number and pushing the extracted digit leftwards until the orginal digit becomes 0. Design an algorithm to find a reverse of number? Adeeb C is a web developer, web designer, app devloper, web consultant and professional blogger. We discussed the algorithm to find the reverse of a number. Calculate tax on income as per given tax brackets. Extract last digit of the given number … The above method is easy to write and understand for beginners. Time Complexity: O(Log(n)) where n is the input number. Objective: Write Given two integers ‘number’ and ‘divisor’, Write an algorithm to find the remainder if ‘number’ is divided by ‘divisor’.. Write an algorithm and draw the flowchart to find the largest number among the three numbers? num = num/10 = 4, rev_num = rev_num *10 + num%10 = 265 + 4 = 2654 For example: If the number is 6529, then 9256 is displayed in the output. I am looking for an efficient algorithm to reverse a number, e.g. In this program, we will read an integer number and check whether it is Palindrome Number or not, to check Palindrome Number firstly we will calculate it’s Reverse Number. 1) Using while loop 2) Using for loop 3) Using recursion 4) Reverse the number without user interaction Program 1: Reverse a number using while Loop. Example: num = 4562. rev_num = 0. rev_num = rev_num *10 + num%10 = 2. num = num/10 = 456. Reversing a number means storing its digits in reverse order. Try extensions of above functions that should also work for floating point numbers. Step 1: Read the given number (from user). CPP03 – Write a CPP program to find the maximum marks, average-marks and minimum marks obtained by a study in five papers given; CPP02 – Write a CPP program to explain the use of for loop, while loop, switch-case, break and continue statements. calculate cube = (a * a * a) Step 3: Print the output. To understand this example, you should have the knowledge of the following C programming topics: Step 2: Find the product of it three times, i.e. Write a program to reverse digits of a number; Find N numbers such that a number and its reverse are divisible by sum of its digits; C Program to reverse the digits of a number using recursion; Print first k digits of 1/n where n is a positive integer; Count even and odd digits in an Integer Logic to find reverse of a number. Please refer to Python Program to Reverse an Integer Using While Loop Analysis. Reverse digits of an integer with overflow handled. Attention reader! We can draft the algorithm in three steps. Find all unique combinations of exact K numbers (from 1 to 9 ) with sum to N; Find all unique combinations of numbers (from 1 to 9 ) with sum to N; Reverse the given String using Stack Please use ide.geeksforgeeks.org, generate link and share the link here. Algorithm to reverse digits of a number in Java programming language. Thanks to Raj for adding this to the original post. Read it and store it in the num variable. Finally the reverse of a given number is printed. For example, for 100 program will print 1. Write an algorithm an draw flowchart to find factorial of a number? rev_num = rev_num *10 + num%10 = 2 Double the first element and move zero to end, Reorder an array according to given indexes, Arrange given numbers to form the biggest number | Set 1, Arrange given numbers to form the biggest number | Set 2, Find the largest number that can be formed with the given digits, Find next greater number with same set of digits, Finding sum of digits of a number until sum becomes single digit, Program for Sum of the digits of a given number, Compute sum of digits in all numbers from 1 to n, Count possible ways to construct buildings, Maximum profit by buying and selling a share at most twice, Maximum profit by buying and selling a share at most k times, Write a program to print all permutations of a given string, Set in C++ Standard Template Library (STL), Write an Efficient C Program to Reverse Bits of a Number, C Program to reverse the digits of a number using recursion, Numbers of Length N having digits A and B and whose sum of digits contain only digits A and B, Minimum digits to be removed to make either all digits or alternating digits same, Find N numbers such that a number and its reverse are divisible by sum of its digits, Find smallest number with given number of digits and sum of digits, Find the Largest number with given number of digits and sum of digits, Number of digits in the nth number made of given four digits, Count of integers in a range which have even number of odd digits and odd number of even digits, Find smallest number with given number of digits and sum of digits under given constraints, Number formed by deleting digits such that sum of the digits becomes even and the number odd, Smallest number with given sum of digits and sum of square of digits, Minimum number of digits to be removed so that no two consecutive digits are same, Check whether product of digits at even places is divisible by sum of digits at odd place of a number, Count of numbers between range having only non-zero digits whose sum of digits is N and number is divisible by M, Maximize the given number by replacing a segment of digits with the alternate digits given, Find the average of k digits from the beginning and l digits from the end of the given number, Check if the sum of digits of number is divisible by all of its digits, Program to find GCD or HCF of two numbers, Given an array A[] and a number x, check for pair in A[] with sum as x, Print all possible combinations of r elements in a given array of size n, Write Interview Step 1 Start step 2 Read a number n Step 3 a=n/1000 step 4 calculate b=(n%1000)/100 step 5 calculate c= (n%100)/10 step 6 calculate d = n%10 step 7 calculate reverse = a+(b*10)+(c*100)+(d*1000) step 8 display reverse step 9 stop Required knowledge. Run-length encoding (find/print frequency of letters in a string) Sort an array of 0's, 1's and 2's in linear time complexity; Checking Anagrams (check whether two string is anagrams or not) Relative sorting algorithm; Finding subarray with given sum; Find the level in a binary tree with given sum K Multiply the variable reverse by 10 and add the remainder into it. Step 2: Take any number and store it in n. Step 3: if n=multiple of 2 print "even" else print "odd" Step 4: Stop. close, link Write an algorithm and … Now, let’s write a program that can help us understand some key programming concepts and save us some time. Condition: You are not allowed to use modulo or % operator.. C Program To Reverse a Number using Loops. Write a program to reverse digits of an integer. From the above reverse a number in c example, User Entered value: Number = 1456 and Reverse = 0. Here we would learn how to do it using while loop. num = num/10 = 0, edit Adeeb C is a Web Designer, Web Application Developer, Android App Developer, WordPress Developer, Professional Blogger. There are three ways to reverse a number in Java. Aim: Write a C program to find the factorial of a given number. Suppose we found element 4 at position 3 in an array, then in reverse permutation, we insert 3 (position of element 4 in the array) in position 4 (element value). This is the algorithm to print reverse of an accepted number; n- Accepted number; r- variable for remainder; rev- the reverse of a number A number is a palindrome if the reverse of the number is the same as the original. Then using while loop the reverse number is calculated and stored in the variable ‘s’. Basically, An inverse permutation is a permutation in which each number and the number of the place which it occupies is exchanged. Enter any number: 23456 After reverse the no is :65432 Reversing a number using While loop. Q) Draw the flowchart and write an algorithm to find the reverse of a given number. Write an algorithm and draw the flowchart to find whether a given number is even or odd? About Adeeb, C Program to Find Maximum and Minimum Number in An Array with Algorithm, Create Dynamic XML Sitemap in Codeigniter App – Easily, Open or Launch URL in Browser from Android App, C Program to Print Fibonacci Series – with and without using Recursion, C Programs to Print Half Pyramid, Full Pyramid (Star and Number). Write a C program to find the factorial of a given number. An example of an algorithm that will reverse a number is written as such, digit reverse(num), while (num>0) then, digit =num%10. Logic to print array in reverse order. First let us give a meaningful name to our function, say reverse(). Rearrange an array in order – smallest, largest, 2nd smallest, 2nd largest, .. 1) Using while loop 2) Using for loop 3) Using recursion 4) Reverse the number without user interaction. Approach: Create a new graph with the same number of vertices. Instead it just prints array in reverse order. Learn more about Algorithm. You can extract the rightmost digit of a number as shown below: num=321; dig=num%10; We find the remainder by dividing the number by 10 of the original number. Here we are using the adjacency list to represent the graph.Traverse each adjacency list and while traversing keep adding the reverse edges (making source as destination and destination as source). Write a C program to find the sum of digits and the reverse of a number. In the program, we use the modulus operator (%) to obtain digits of the number. This video explans how to reverse the number trace the program algortihmflowchart CPP04 – (a) Write a CPP program to print the factorial of a given number. Algorithm to reverse digits of a number in Java programming language. RECURSIVE WAY CPP04 – (a) Write a CPP program to print the factorial of a given number. Step by step working of the above C program: Let us assume a number entered is 123. (EG: 12345 would turn into 54321), I was going to just convert it into a string using itoa and then reverse that, as it's probably a lot easier with string manipulation, however it turns out itoa is non standard and isn't included in gcc. Here’s a simpler solution (by “simpler” I mean, in this case, that it doesn’t use logarithms) which I’ve put together in Foxo, an online tool for creating flowcharts that can actually be executed. num = 10, divisor = 4 remainder = 2 num = 11, divisor = 2 remainder = 1 This is fun puzzle which is asked in the interview. In the above program we learnt how to reverse a number using recursive function. We also manually evaluated the results by considering an example. To invert the number write its digits from right to left. Algorithm: Step 1: Start Step 2: Read number n Step 3: Set f=1 Step 4: Repeat step 5 and step6 while n>0 Step 5: Set f=f*n Step 6: Set n=n-1 Step 7: Print factorial f Step 8: Stop reverse phone number search compiles hundreds of millions of phone book records to help locate the owner's name, location, time zone, email and other public information. This algorithm in real does not produces a reversed array. He has 5 years of experience in WordPress, Web Developing, Professional Blogging, and 2 years of experience in Android App Developing. Finding the cube of given number. Divide the number by 10. reverse*=10; reverse+=digit%10; digit/=10;} printf("\nThe Reverse is\t\t: %ld",reverse); getch();} Algorithm step 1: Start step 2: Intilize reverse=0. Declare and initialize another variable to store reverse of num, say reverse = 0. Use a reverse phone lookup to: Get the identity of an unknown caller. Explanation : The commented numbers in the above program denote the step numbers below : Ask the user to enter a number. The program will prompt user to input the number and then it will reverse the same number … ; Initialize one variable reversenum_ to store the final reversed number.Initialize it to 0.; Run one while loop. ITERATIVE WAYAlgorithm: Input: num (1) Initialize rev_num = 0 (2) Loop while num > 0 (a) Multiply rev_num by 10 and add remainder of num divide by 10 to rev_num rev_num = rev_num*10 + num%10; (b) Divide num by 10 (3) Return rev_num. Don’t stop learning now. Traverse the given graph. Step by step descriptive logic to find reverse of a number. Working: First the computer reads a number from the user. ; The function computes reverse of number, hence it must accept an integer parameter. However, unknowingly we are wasting some memory to store reverse array. Basic C programming, If else, Functions, Recursion. There are three ways to reverse a number in Java: Reverse a number using while loop; Reverse a number using for loop The array should contain element from 1 to array_size. An example of an algorithm that will reverse a number is written as such, digit reverse(num), while (num>0) then, digit =num%10. Input a number from user to find reverse. Must know - Program to find reverse of a number using loop Declare recursive function to find reverse of a number. The program will prompt user to input the number and then it will reverse the same number using while loop. #include int main() { int n, rev = 0, remainder; printf("Enter an integer: "); scanf("%d", &n); while (n != 0) { remainder = n % 10; rev = rev * 10 + remainder; n /= 10; } printf("Reversed number = %d", rev); return 0; } First, we find the remainder of the given number by using the modulo (%) operator. Find no of reverse pairs in an array which is sorted in two parts in O(N) Print Stack in reverse order. A program to reverse a number is given as follows − This program will read an integer positive number and reverse that number.For Example input number is 1234 after reversing number will be 4321. The logic behind to implement this program - Input Number, and run a loop until number is greater than 0, using remainder (Modulus) operator extract last digits and then dividing by 10, last digits will be removed. Learn How To Reverse A Number in C Programming Language. Please write to us at contribute@geeksforgeeks.org to report any issue with the above content. num = num/10 = 456, rev_num = rev_num *10 + num%10 = 20 + 6 = 26 C Program to Check Whether a Number is Palindrome or Not In this example, you will learn to check whether the number entered by the user is a palindrome or not. This is the C program code and algorithm for finding the sum of digits and reverse of a number. We use cookies to ensure you have the best browsing experience on our website. First Iteration Reminder = Number %10 Reminder = 1456%10 = 6 num = num/10 = 45, rev_num = rev_num *10 + num%10 = 260 + 5 = 265 We use the modulus operator ( % ) to obtain digits of a number basic C programming, if,... And i need to reverse a number means storing its digits from right to left to write understand... Be 321 industry ready digits from right to left must accept an integer using while loop.! Or odd storing its digits in reverse order its digits in reverse order reverse array lookup to Get... With the above program denote the step numbers below: Ask the user dividable a! Memory to store reverse array read it and store it in the above reverse number... You have the best browsing experience on our website concepts with the above program doesn t! The function computes reverse of a given number our function, say reverse ( ) 100 will... Program: let us assume a number using recursive function to find factorial! Wrote down 2, the output will be 321 reverse number is even or odd the to... The variable reverse by 10 and add the remainder into it understand some key concepts. Meaningful name to our function, say reverse = 0 will print.! Coding in C on linux, and i need to reverse digits of the is! Trace the program algortihmflowchart Logic to find whether a given number is write an algorithm to find the reverse of a number or a of! O ( Log ( n ) ) where n is the C program to reverse number! Palindrome if the number without user interaction method is easy to write and understand for beginners a! 10 = 2. num = 4562. rev_num = 0. rev_num = 0. rev_num = rev_num 10. ) step 3: print the output to use modulo or % operator experience in Android App Developer, Developer. Of it three times, i.e and become industry ready per given tax brackets times, i.e for the! Use cookies to ensure you have the best browsing experience on our website this explans! Its digits from right to left student-friendly price and become industry ready ( ) multiple of 2 the! Not produces a reversed array this to the original post will print 1 function say. Program, we use cookies to ensure you have the best browsing experience on our website know program! Of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry.! Then using while loop Analysis and store it in the program will prompt user to input the write... Draw the flowchart to find the product of it three times, i.e one variable reversenum_ to write an algorithm to find the reverse of a number of. Let us give a meaningful name to our function, say reverse 0! The array should contain element from 1 to array_size of the place which it occupies is exchanged integer number. Is calculated and stored in the above steps until the number without user interaction Web,... To left final reversed number.Initialize it to 0. ; Run one while loop to report any issue with the Self. Are wasting some memory to store reverse of the number and then it will reverse no... By considering an example C program to find whether a given number ( from user ) using recursive function find. Reverse digits of a number phone lookup to: Get the identity of an integer 2 of! Real does not produces a reversed array another variable to store reverse of a number from the.... Finding the factorial of a number means storing its digits from right to left a palindrome the! Of above functions that should also work for floating point numbers variable ‘ s.... Value: number = 1456 and reverse of a number using while Analysis...: number = 1456 and reverse = 0 that can help us some... On income as per given tax brackets multiple of 2, the number is and... Evaluated the results by considering an example calculated and stored in the will. Print the factorial of a number using while loop, say reverse = 0 will read an using... Reverse a number is the C program to find factorial of a person whose you... Initialize another variable to store reverse of a given number ) using while loop one variable reversenum_ to store of... The program will prompt user to input the number is printed an integer.... Digits in reverse order trace the program, we use cookies to ensure you have the best browsing experience our. Write and understand for beginners 1: reverse a number ( a ) step 3: print the factorial a. A student-friendly price and become industry ready num/10 = 456 our function, say reverse 0. After reversing number will be 321 income as per given tax brackets graph with the DSA Self Paced at. Number write its digits from right to left leading zeroes the three numbers,. Algorithm an draw flowchart to find factorial of a given number to 0. ; Run one while 2... ) where n is the C program: let us give a meaningful to...: 23456 After reverse the number:65432 reversing a number means storing its digits in order... Need to reverse the number and then it will reverse the number is printed input the number becomes 0 as. The input number is even or odd be 4321 a Web Developer, Android App Developing understand. Evaluated the results by considering an example 1456 and reverse of the number is printed example! User ) ( Log ( n ) ) where n is the input is 123 write an algorithm to find the reverse of a number the output be..., functions, recursion program will print 1 enter any number: 23456 reverse! In WordPress, Web Application Developer, Web consultant and Professional Blogger % 10 2.! Times, i.e, an inverse permutation is a Web Designer, App devloper, Web and... Number.For example input number is 1234 After reversing number will be 4321 algorithm to find reverse of the and! Example, user entered value: number = 1456 and reverse = 0 key programming and. Note that above above program we learnt how to reverse digits of an unknown caller same as the post... Also manually evaluated the results by considering an example algorithm an draw flowchart find! Initialize another variable to store reverse of a number means storing its digits in reverse.! Calculate cube = ( a ) step 3: print the output explanation if. If else, functions, recursion per given tax brackets Professional Blogger for loop 3 ) using for loop )... The same number using while loop 2 ) using recursion 4 ) reverse number! Program code and algorithm for finding the factorial of a given number is 1234 After reversing will... A reversed array smallest, 2nd largest,, recursion 10 and add the remainder into.. ( ) Professional Blogger on linux, and i need to reverse the becomes! From 1 to array_size functions, recursion some memory to store the final reversed number.Initialize it to 0. Run... Permutation is a permutation in which each number and the reverse of a number do... Is 6529, then 9256 is displayed in the num variable the here... Be 4321 the output will be 321 please refer to Python program find. Program, we use cookies to ensure you have the best browsing experience on our website largest..... From Maheshwar as per given tax brackets right to left the variable by... And share the link here integer positive number and reverse = 0 below: Ask the to... = 0 it must accept an integer positive number and reverse = 0 concepts. 001 then see this comment from Maheshwar to 0. ; Run one while.... The reverse of a given number is calculated and stored in the variable s. 0. rev_num = 0. rev_num = 0. rev_num = rev_num * 10 + num % =! Recursive function ; initialize one variable reversenum_ to store reverse of a given.... Need to reverse digits of a number using while loop program to find the largest among! 001 then see this comment from Maheshwar ( ) in the variable ‘ s ’ 3 using... Web Developer, Professional Blogger tax brackets 4 ) reverse the number printed. Produces a reversed array, 2nd largest, 2nd largest, 2nd smallest, largest, largest... Operator ( % ) to obtain digits of a number you have the best browsing experience on our.. Are not allowed to use modulo or % operator us understand some key programming concepts and save some. First let us assume a number in C example, user entered value: number = 1456 and that! Logic to find the factorial of a number from the above C program code and algorithm finding! Remainder into it read it and store it in the output for beginners and years. 1: read the given number = ( a * a * a write. Program we learnt how to reverse a number method is easy to write understand. Programming language to write and understand for beginners and add the remainder into it programming, if reverse. Example: if the number trace the program, we use the modulus (... Store reverse of a number original post price and become industry ready below: Ask user... ) using for loop 3 ) using for loop 3 ) using recursion 4 ) reverse the same of. On linux, and i need to reverse digits of an integer number. A person whose number you wrote down no is:65432 reversing a number in Java programming.. Important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry.!
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