C Program to reverse a number using pointers


In this program, You will learn how to reverse a number using pointers in C.


123 => 321

456 => 654


Example: How to reverse a number using pointers in C

Run it Now
#include<stdio.h>

int main() {

    int n, r, rev = 0;
    int *num;

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

    num = &n;

    while (*num > 0) {
        r = *num % 10;
        rev = rev * 10 + r;
        *num = *num / 10;
    }

    printf("\nReverse number is : %d", rev);

    return 0;
}

Output:

Enter a number : 103
Reverse number is : 301