Java sqr sqrt(final double x)

Description

sqrt

License

Open Source License

Declaration

public final static double sqrt(final double x) 

Method Source Code

//package com.java2s;
/*/* w  w  w . j  a  va2s.  c  o  m*/
 * Copyright (C) 2012 CyborgDev <cyborg@alta189.com>
 *
 * This file is part of Cyborg
 *
 * Cyborg 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.
 *
 * Cyborg 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.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    public final static double sqrt(final double x) {
        return x * inverseSqrt(x);
    }

    public final static double inverseSqrt(double x) {
        final double xhalves = 0.5d * x;
        x = Double.longBitsToDouble(0x5FE6EB50C7B537AAl - (Double.doubleToRawLongBits(x) >> 1));
        return x * (1.5d - xhalves * x * x);
    }
}

Related

1. sqrt(double n)
2. sqrt(double value)
3. sqrt(double value)
4. sqrt(double x, int precision)
5. sqrt(final double i)
6. sqrt(float a)
7. sqrt(float a)
8. sqrt(float f)
9. sqrt(int n)