Here you can find the source of squareRoot(double val, int n)
public static double squareRoot(double val, int n)
//package com.java2s; /**//from w w w . j av a 2 s . c om * SOWGware, Copyright 2010 * * This file is part of SOWGcalc. SOWGcalc 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. SOWGcalc 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 SOWGcalc. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static double squareRoot(double val, int n) { double retVal = Math.sqrt(val); if (n > 1) { //recursion retVal = squareRoot(retVal, n - 1); } return retVal; } }