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;
}

Enter a Number : 55
Product of Digits = 25