package api;

/** Class showing inventive, non-expected use of 

 * Arithmetica methods to do multiplication instead of

 * addition.

 */

//BEGIN: design.composition.arith.factorial

public final class Factorial extends Arithmetica {

    public static int factorial(int n) {

        return new Factorial().sumRange(1, n);

    }

    @Override

    public int sumTwo(int one, int second) {

        return one * second;

    }

}

//END: design.composition.arith.factorial