@stdlib/assert-is-even NPM

isEven

Test if a value is an even number.

Installation

npm install @stdlib/assert-is-even

Usage

var isEven = require( '@stdlib/assert-is-even' );

isEven( value )

Tests if a value is an even number.

var Number = require( '@stdlib/number-ctor' );

var bool = isEven( 6.0 );
// returns true

bool = isEven( new Number( 6.0 ) );
// returns true

bool = isEven( 3.0 );
// returns false

bool = isEven( -3.14 );
// returns false

bool = isEven( null );
// returns false

bool = isEven( NaN );
// returns false

isEven.isPrimitive( value )

Tests if a value is a primitive even number.

var Number = require( '@stdlib/number-ctor' );

var bool = isEven.isPrimitive( -4.0 );
// returns true

bool = isEven.isPrimitive( new Number( -4.0 ) );
// returns false

isEven.isObject( value )

Tests if a value is a Number object having an even number value.

var Number = require( '@stdlib/number-ctor' );

var bool = isEven.isObject( 4.0 );
// returns false

bool = isEven.isObject( new Number( 4.0 ) );
// returns true

Examples

var Number = require( '@stdlib/number-ctor' );
var isEven = require( '@stdlib/assert-is-even' );

var bool = isEven( 4.0 );
// returns true

bool = isEven( 0.0 );
// returns true

bool = isEven( new Number( 4 ) );
// returns true

bool = isEven( 5.0 );
// returns false

bool = isEven( NaN );
// returns false

bool = isEven( '5' );
// returns false

bool = isEven( null );
// 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.