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    @stdlib/math-base-special-trunc
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    0.0.7 • Public • Published

    Truncate

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    Round a double-precision floating-point number toward zero.

    Installation

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

    Usage

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

    trunc( x )

    Rounds a double-precision floating-point number toward zero.

    var v = trunc( -4.2 );
    // returns -4.0
    
    v = trunc( 9.99999 );
    // returns 9.0
    
    v = trunc( 0.0 );
    // returns 0.0
    
    v = trunc( -0.0 );
    // returns -0.0
    
    v = trunc( NaN );
    // returns NaN
    
    v = trunc( Infinity );
    // returns Infinity
    
    v = trunc( -Infinity );
    // returns -Infinity

    Examples

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

    C APIs

    Installation

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

    Usage

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

    stdlib_base_trunc( x )

    Rounds a double-precision floating-point number toward zero.

    double y = stdlib_base_trunc( 3.14 );
    // returns 3.0

    The function accepts the following arguments:

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

    Examples

    #include "stdlib/math/base/special/trunc.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_trunc( x[ i ] );
            printf( "trunc(%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-trunc

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    4,225

    Version

    0.0.7

    License

    Apache-2.0

    Unpacked Size

    49 kB

    Total Files

    16

    Last publish

    Collaborators

    • stdlib-bot
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    • rreusser