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C Program to reverse a number


In this program, You will learn how to reverse a number in c.


123 => 321

345 => 543

Example: How to reverse a number in c

#include<stdio.h>
int main() {

  int n, r, rev = 0;

  printf("Enter a number:");
  scanf("%d", &n);

  while (n > 0) {
    r = n % 10;
    rev = rev * 10 + r;
    n = n / 10;
  }
  printf("Reverse number is:%d", rev);

  return 0;
}

Output:

Enter a number:123
Reverse number is:321