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C Program to Reverse a given Number using Recursive Function

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In this tutorial, we will write a program to reverse an input number using recursion in C. Before that you may go through the following topic in C programming.

C Program to Reverse a given Number using Recursive Function

#include <stdio.h>

int recursive_func(int, int);

int main()
{
  int num, result;

  printf("Enter the number: ");
  scanf("%d", &num);

  //calling recursive function
  result = recursive_func(num, 0);

  printf("Reverse of %d is %d", num, result);

  return 0;
}

int recursive_func(int num, int rev)
{
  if (num == 0)
    return rev;
  else
    return recursive_func(num/10, rev*10 + num%10);
}

Output:

Enter the number: 789456
Reverse of 789456 is 654987

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