Hello.c

#include <stdio.h>

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;

}