Here you can find the source of factorialAsDouble(int n)
public static double factorialAsDouble(int n)
//package com.java2s; /*/*from w w w . j a v a 2 s .c om*/ * Java Information Dynamics Toolkit (JIDT) * Copyright (C) 2012, Joseph T. Lizier * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static double factorialAsDouble(int n) { double result = 1; for (int i = 1; i <= n; i++) { result *= (double) i; } return result; } }