@stdlib/math-base-assert-is-odd

isOdd

Test if a finite numeric value is an odd number.

Installation

npm install @stdlib/math-base-assert-is-odd

Usage

var isOdd = require( '@stdlib/math-base-assert-is-odd' );

isOdd( x )

Tests if a finite numeric value is an odd number.

var bool = isOdd( 5.0 );
// returns true

bool = isOdd( -2.0 );
// returns false

bool = isOdd( 0.0 );
// returns false

bool = isOdd( NaN );
// returns false

Notes

• The function assumes a finite number. If provided positive or 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 &&
          x > -Infinity &&
          isOdd( x )
      );
  }
  
  var bool = check( Infinity );
  // returns false
  
  bool = check( -Infinity );
  // returns false
  

Examples

var randu = require( '@stdlib/random-base-randu' );
var round = require( '@stdlib/math-base-special-round' );
var isOdd = require( '@stdlib/math-base-assert-is-odd' );

var bool;
var x;
var i;

for ( i = 0; i < 100; i++ ) {
    x = round( randu()*100.0 );
    bool = isOdd( x );
    console.log( '%d is %s', x, ( bool ) ? 'odd' : 'not odd' );
}

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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.