CP: factorial

Que: Factorial program in C using a for loop

The factorial of a positive number n is given by:

factorial of n (n!) = 1*2*3*4....n

The factorial of a negative number doesn't exist. And the factorial of 0 is 1

Code: 

#include <stdio.h>

int main()
{
  int c, n, fact = 1;

  printf("Enter a number to calculate its factorial= ");
  scanf("%d", &n);

  for (c = 1; c <= n; c++)
    fact = fact * c;

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

  return 0;

}

Output: