Factorial number

#include <stdio.h>
 
int main()
{
  int c,n,f=1;
 
  printf("Enter a number to calculate its factorial\n");
  scanf("%d", &n);
  for (c=1; c<=n; c++)
     f=f*c;
 
  printf("Factorial of %d = %d\n", n, f);
 
  return 0;
}