class Factorial
{
   public int result = 1;

   Factorial (int n)
   {
      if (n < 2)
         result = 1;
      else 
         for (int i=n; i>0; i--)
            result = result * i;
    }
 
   public static void main (String[] args)
   {
      Factorial f1 = new Factorial (15);
      System.out.println ("Factorial (15) = " + f1.result);
      Factorial f2 = new Factorial (4);
      System.out.println ("Factorial (4) = " + f2.result);
   }
}