@stdlib/math-base-assert-is-negative-integer
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    0.0.6 • Public • Published

    isNegativeInteger

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    Test if a finite double-precision floating-point number is a negative integer.

    Installation

    npm install @stdlib/math-base-assert-is-negative-integer

    Usage

    var isNegativeInteger = require( '@stdlib/math-base-assert-is-negative-integer' );

    isNegativeInteger( x )

    Tests if a finite double-precision floating-point number is a negative integer.

    var bool = isNegativeInteger( -1.0 );
    // returns true
    
    bool = isNegativeInteger( 0.0 );
    // returns false
    
    bool = isNegativeInteger( 10.0 );
    // returns false

    Notes

    • The function assumes a finite number. If provided negative infinity, the function will return true, when, in fact, the result is undefined. If x can be infinite, wrap the implementation as follows:

      function check( x ) {
          return (
              x > -Infinity &&
              isNegativeInteger( x )
          );
      }
      
      var bool = check( -Infinity );
      // returns false

    Examples

    var isNegativeInteger = require( '@stdlib/math-base-assert-is-negative-integer' );
    
    var bool = isNegativeInteger( -5.0 );
    // returns true
    
    bool = isNegativeInteger( 0.0 );
    // returns false
    
    bool = isNegativeInteger( 1.0 );
    // returns false
    
    bool = isNegativeInteger( -3.14 );
    // returns false
    
    bool = isNegativeInteger( NaN );
    // returns false

    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-assert-is-negative-integer

    Homepage

    stdlib.io

    DownloadsWeekly Downloads

    7,882

    Version

    0.0.6

    License

    Apache-2.0

    Unpacked Size

    36.6 kB

    Total Files

    9

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