/* Iterative calculation of factorials. */

#include <stdio.h>

int fak( int n )
{ 
  int r; int i;

  r = 1;
  for ( i=1 ; i<n ; i++)
    r = r*(i+1);
  
  return r;
}

int main()
{
  printf("fak(4) = %d. \n", fak(4));

}