Java Number Sign signum(final int n)

Description

Returns the signum function of the argument; zero if the argument is zero, 1 if the argument is greater than zero, -1 if the argument is less than zero.

License

Open Source License

Parameter

Parameter	Description
n	the integer value whose signum is to be returned

Return

the signum function of the argument

Declaration

public static int signum(final int n)

Method Source Code

//package com.java2s;
/* Util.java//w  w  w  . j  a v a  2  s . c om
 *
 * Copyright (C) 2015, Tom? Pecina <tomas@pecina.cz>
 *
 * This file is part of cz.pecina.retro, retro 8-bit computer emulators.
 *
 * This application 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 application 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 {
    /**
     * Returns the signum function of the argument; zero if the argument is
     * zero, 1 if the argument is greater than zero, -1 if the argument is
     * less than zero.
     *
     * @param  n the integer value whose signum is to be returned
     * @return   the signum function of the argument
     */
    public static int signum(final int n) {
        if (n > 0) {
            return 1;
        } else if (n < 0) {
            return -1;
        } else {
            return 0;
        }
    }

    /**
     * Returns the signum function of the argument; zero if the argument is
     * zero, 1 if the argument is greater than zero, -1 if the argument is
     * less than zero.
     *
     * @param  n the long value whose signum is to be returned
     * @return   the signum function of the argument
     */
    public static long signum(final long n) {
        if (n > 0) {
            return 1;
        } else if (n < 0) {
            return -1;
        } else {
            return 0;
        }
    }
}