Java tutorial
/* This program is a part of the companion code for Core Java 8th ed. (http://horstmann.com/corejava) 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/>. */ import java.util.Scanner; /** * This program demonstrates a <code>while</code> loop. * * @version 1.20 2004-02-10 * @author Cay Horstmann */ public class Retirement { public static void main(String[] args) { // read inputs Scanner in = new Scanner(System.in); System.out.print("How much money do you need to retire? "); double goal = in.nextDouble(); System.out.print("How much money will you contribute every year? "); double payment = in.nextDouble(); System.out.print("Interest rate in %: "); double interestRate = in.nextDouble(); double balance = 0; int years = 0; // update account balance while goal isn't reached while (balance < goal) { // add this year's payment and interest balance += payment; double interest = balance * interestRate / 100; balance += interest; years++; } System.out.println("You can retire in " + years + " years."); } }