Factorial program in C?

The factorial of a positive integer n is equal to 1*2*3*...n. You will learn to calculate the factorial of a number using for loop in this example.

#include <stdio.h>

int main()

{

  int c, n, fact = 1;

  printf("Enter a number to calculate its factorial\n");

  scanf("%d", &n);

  for (c = 1; c <= n; c++)

    fact = fact * c;

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

  return 0;

}