138 lines
2.7 KiB
Markdown
138 lines
2.7 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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# isNegativeNumber
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> Test if a value is a number having a negative value.
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<section class="usage">
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## Usage
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```javascript
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var isNegativeNumber = require( '@stdlib/assert/is-negative-number' );
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```
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#### isNegativeNumber( value )
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Tests if a `value` is a `number` having a negative value.
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<!-- eslint-disable no-new-wrappers -->
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```javascript
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var Number = require( '@stdlib/number/ctor' );
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var bool = isNegativeNumber( -5.0 );
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// returns true
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bool = isNegativeNumber( new Number( -5.0 ) );
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// returns true
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bool = isNegativeNumber( -3.14 );
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// returns true
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bool = isNegativeNumber( 5.0 );
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// returns false
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bool = isNegativeNumber( null );
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// returns false
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```
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#### isNegativeNumber.isPrimitive( value )
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Tests if a `value` is a primitive `number` having a negative value.
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<!-- eslint-disable no-new-wrappers -->
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```javascript
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var Number = require( '@stdlib/number/ctor' );
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var bool = isNegativeNumber.isPrimitive( -3.0 );
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// returns true
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bool = isNegativeNumber.isPrimitive( new Number( -3.0 ) );
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// returns false
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```
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#### isNegativeNumber.isObject( value )
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Tests if a `value` is a `Number` object having a negative value.
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<!-- eslint-disable no-new-wrappers -->
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```javascript
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var Number = require( '@stdlib/number/ctor' );
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var bool = isNegativeNumber.isObject( -3.0 );
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// returns false
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bool = isNegativeNumber.isObject( new Number( -3.0 ) );
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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-disable no-new-wrappers -->
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<!-- eslint no-undef: "error" -->
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```javascript
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var Number = require( '@stdlib/number/ctor' );
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var isNegativeNumber = require( '@stdlib/assert/is-negative-number' );
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var bool = isNegativeNumber( -5.0 );
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// returns true
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bool = isNegativeNumber( new Number( -5.0 ) );
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// returns true
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bool = isNegativeNumber( -3.14 );
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// returns true
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bool = isNegativeNumber( 0.0 );
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// returns false
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bool = isNegativeNumber( 5.0 );
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// returns false
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bool = isNegativeNumber( '-5' );
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// returns false
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bool = isNegativeNumber( null );
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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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