71 lines
1.3 KiB
Markdown
71 lines
1.3 KiB
Markdown
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@license Apache-2.0
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Copyright (c) 2018 The Stdlib Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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# isnan
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> Test if a double-precision floating-point numeric value is NaN.
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<section class="usage">
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## Usage
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```javascript
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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```
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#### isnan( x )
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Tests if a double-precision floating-point `numeric` value is `NaN`.
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```javascript
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var bool = isnan( NaN );
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// returns true
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```
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</section>
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<!-- /.usage -->
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<section class="examples">
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## Examples
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<!-- eslint no-undef: "error" -->
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```javascript
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var isnan = require( '@stdlib/math/base/assert/is-nan' );
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var bool = isnan( NaN );
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// returns true
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bool = isnan( 5.0 );
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// returns false
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```
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</section>
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<!-- /.examples -->
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<section class="links">
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</section>
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<!-- /.links -->
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