@stdlib/number-float32-base-signbit
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    0.0.5 • Public • Published

    signbit

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    Return a boolean indicating if the sign bit for a single-precision floating-point number is on (true) or off (false).

    Installation

    npm install @stdlib/number-float32-base-signbit

    Usage

    var signbitf = require( '@stdlib/number-float32-base-signbit' );

    signbitf( x )

    Returns a boolean indicating if the sign bit for a single-precision floating-point number is on (true) or off (false).

    var toFloat32 = require( '@stdlib/number-float64-base-to-float32' );
    
    var bool = signbitf( toFloat32( 4.0 ) );
    // returns false
    
    bool = signbitf( toFloat32( -9.14e-34 ) );
    // returns true
    
    bool = signbitf( 0.0 );
    // returns false
    
    bool = signbitf( -0.0 );
    // returns true

    Examples

    var toFloat32 = require( '@stdlib/number-float64-base-to-float32' );
    var randu = require( '@stdlib/random-base-randu' );
    var signbitf = require( '@stdlib/number-float32-base-signbit' );
    
    var sign;
    var x;
    var i;
    
    for ( i = 0; i < 100; i++ ) {
        x = (randu()*100.0) - 50.0;
        x = toFloat32( x );
        sign = signbitf( x );
        sign = ( sign ) ? 'true' : 'false';
        console.log( 'x: %d. signbit: %s.', x, sign );
    }

    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/number-float32-base-signbit

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    10

    Version

    0.0.5

    License

    Apache-2.0

    Unpacked Size

    36.5 kB

    Total Files

    9

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser