Write Factorial program in C.

#include <stdio.h>

void main()

{

  int c, n, fact = 1;

  printf("Enter a number to calculate it's factorial\n");

  scanf("%d", &n);

  for (c = 1; c <= n; c++)

    fact = fact * c;

  printf("Factorial of %d = %d\n", n, fact);

}