#include <stdio.h>
int fact(int n);
int main()
{
  int n;
  printf("Enter the number to find out factorial: ");
  scanf("%d", &n);
  printf("The factorial is %d", fact(n));
}
int fact(int n)
{
  if (n == 0)
    return 1;
  else
  {
    return n * fact(n - 1);
  }
}