@stdlib/math-base-special-abs
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    0.0.5 • Public • Published

    Absolute Value

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    Compute the absolute value of a double-precision floating-point number.

    The absolute value is defined as

    Absolute value

    Installation

    npm install @stdlib/math-base-special-abs

    Usage

    var abs = require( '@stdlib/math-base-special-abs' );

    abs( x )

    Computes the absolute value of a double-precision floating-point number.

    var v = abs( -1.0 );
    // returns 1.0
    
    v = abs( 2.0 );
    // returns 2.0
    
    v = abs( 0.0 );
    // returns 0.0
    
    v = abs( -0.0 );
    // returns 0.0
    
    v = abs( NaN );
    // returns NaN

    Examples

    var randu = require( '@stdlib/random-base-randu' );
    var round = require( '@stdlib/math-base-special-round' );
    var abs = require( '@stdlib/math-base-special-abs' );
    
    var rand;
    var i;
    
    for ( i = 0; i < 100; i++ ) {
        rand = round( randu() * 100.0 ) - 50.0;
        console.log( 'abs(%d) = %d', rand, abs( rand ) );
    }

    C APIs

    Installation

    npm install @stdlib/math-base-special-abs

    Usage

    #include "stdlib/math/base/special/abs.h"

    stdlib_base_abs( x )

    Computes the absolute value of a double-precision floating-point number.

    double y = stdlib_base_abs( -5.0 );
    // returns 5.0

    The function accepts the following arguments:

    • x: [in] double input value.
    double stdlib_base_abs( const double x );

    Examples

    #include "stdlib/math/base/special/abs.h"
    #include <stdio.h>
    
    int main() {
        double x[] = { 3.14, -3.14, 0.0, 0.0/0.0 };
    
        double y;
        int i;
        for ( i = 0; i < 4; i++ ) {
            y = stdlib_base_abs( x[ i ] );
            printf( "|%lf| = %lf\n", x[ i ], y );
        }
    }

    Notice

    This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

    For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

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    License

    See LICENSE.

    Copyright

    Copyright © 2016-2021. The Stdlib Authors.

    Install

    npm i @stdlib/math-base-special-abs

    Homepage

    stdlib.io

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    5,445

    Version

    0.0.5

    License

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    59.7 kB

    Total Files

    19

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    Collaborators

    • stdlib-bot
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