How to define a product in C Language

#include <stdio.h&t;
int main()
{
    int n, prod = 1, rem;
    printf("enter a number : ");
    scanf("%d", &n);
    while (n > 0)
    {
        rem = n % 10;
        prod *= rem;
        n /= 10;
    }
    printf("product of digits = %d\n", prod);
    return 0;
}