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

Run it Now
#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("\nReverse Number is :%d", rev);

   return 0;
}

Output:

Enter a Number :123
Reverse Number is :321