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    @stdlib/math-base-special-trunc10
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    0.0.5 • Public • Published

    trunc10

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    Round a numeric value to the nearest power of 10 toward zero.

    Installation

    npm install @stdlib/math-base-special-trunc10

    Usage

    var trunc10 = require( '@stdlib/math-base-special-trunc10' );

    trunc10( x )

    Rounds a numeric value to the nearest power of 10 toward zero.

    var v = trunc10( -4.2 );
    // returns -1.0
    
    v = trunc10( -4.5 );
    // returns -1.0
    
    v = trunc10( -4.6 );
    // returns -1.0
    
    v = trunc10( 9.99999 );
    // returns 1.0
    
    v = trunc10( 9.5 );
    // returns 1.0
    
    v = trunc10( 13.0 );
    // returns 10.0
    
    v = trunc10( -13.0 );
    // returns -10.0
    
    v = trunc10( 0.0 );
    // returns 0.0
    
    v = trunc10( -0.0 );
    // returns -0.0
    
    v = trunc10( Infinity );
    // returns Infinity
    
    v = trunc10( -Infinity );
    // returns -Infinity
    
    v = trunc10( NaN );
    // returns NaN

    Notes

    • The function may not return accurate results for subnormals due to a general loss in precision.

      var v = trunc10( 1.0e-323 ); // should return 1.0e-323
      // returns 0.0

    Examples

    var randu = require( '@stdlib/random-base-randu' );
    var trunc10 = require( '@stdlib/math-base-special-trunc10' );
    
    var x;
    var v;
    var i;
    
    for ( i = 0; i < 100; i++ ) {
        x = (randu()*100.0) - 50.0;
        v = trunc10( x );
        console.log( 'Value: %d. Rounded: %d.', x, v );
    }

    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-trunc10

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    14

    Version

    0.0.5

    License

    Apache-2.0

    Unpacked Size

    36.2 kB

    Total Files

    9

    Last publish

    Collaborators

    • stdlib-bot
    • kgryte
    • planeshifter
    • rreusser