# isNull
> Test if a value is null.
## Usage
```javascript
var isNull = require( '@stdlib/assert/is-null' );
```
#### isNull( value )
Tests if a `value` is `null`.
```javascript
var bool = isNull( null );
// returns true
```
## Examples
```javascript
var isNull = require( '@stdlib/assert/is-null' );
var bool = isNull( null );
// returns true
bool = isNull( 'beep' );
// returns false
bool = isNull( 5 );
// returns false
bool = isNull( void 0 );
// returns false
bool = isNull( true );
// returns false
bool = isNull( {} );
// returns false
bool = isNull( [] );
// returns false
bool = isNull( function foo() {} );
// returns false
```