isnan

Test if a double-precision floating-point numeric value is NaN.

Installation

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

Usage

var isnan = require( '@stdlib/math-base-assert-is-nan' );

isnan( x )

Tests if a double-precision floating-point numeric value is NaN.

var bool = isnan( NaN );
// returns true

Examples

var isnan = require( '@stdlib/math-base-assert-is-nan' );

var bool = isnan( NaN );
// returns true

bool = isnan( 5.0 );
// returns false

See Also

• @stdlib/math-base/assert/is-nanf: test if a single-precision floating-point numeric value is NaN.

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.

Community

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.