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

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isfinite

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

Installation

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

Usage

var isfinite = require( '@stdlib/math-base-assert-is-finite' );

isfinite( x )

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

var bool = isfinite( 3.14 );
// returns true

bool = isfinite( Infinity );
// returns false

bool = isfinite( -Infinity );
// returns false

bool = isfinite( NaN );
// returns false

Examples

var PINF = require( '@stdlib/constants-float64-pinf' );
var NINF = require( '@stdlib/constants-float64-ninf' );
var isfinite = require( '@stdlib/math-base-assert-is-finite' );

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

bool = isfinite( -2.0e64 );
// returns true

bool = isfinite( PINF );
// returns false

bool = isfinite( NINF );
// returns false

bool = isfinite( NaN );
// returns false

See Also

• @stdlib/math-base/assert/is-infinite: test if a double-precision floating-point numeric value is infinite.

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 © 2016-2026. The Stdlib Authors.