README.md

isnan

Test if a double-precision floating-point numeric value 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

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See Also

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