# isCubeNumber
> Test if a value is a cube number.
A **cube number** is defined as an integer value which is the cube of an integer.
## Usage
```javascript
var isCubeNumber = require( '@stdlib/assert/is-cube-number' );
```
#### isCubeNumber( value )
Tests if a `value` is a cube number.
```javascript
var Number = require( '@stdlib/number/ctor' );
var bool = isCubeNumber( 8.0 );
// returns true
bool = isCubeNumber( new Number( 8.0 ) );
// returns true
bool = isCubeNumber( 3.14 );
// returns false
bool = isCubeNumber( -5.0 );
// returns false
bool = isCubeNumber( NaN );
// returns false
bool = isCubeNumber( null );
// returns false
```
#### isCubeNumber.isPrimitive( value )
Tests if a `value` is a primitive cube number.
```javascript
var Number = require( '@stdlib/number/ctor' );
var bool = isCubeNumber.isPrimitive( 8.0 );
// returns true
bool = isCubeNumber.isPrimitive( new Number( 8.0 ) );
// returns false
```
#### isCubeNumber.isObject( value )
Tests if a `value` is a `Number` object having a value which is a cube number.
```javascript
var Number = require( '@stdlib/number/ctor' );
var bool = isCubeNumber.isObject( 8.0 );
// returns false
bool = isCubeNumber.isObject( new Number( 8.0 ) );
// returns true
```
## Examples
```javascript
var Number = require( '@stdlib/number/ctor' );
var isCubeNumber = require( '@stdlib/assert/is-cube-number' );
var bool = isCubeNumber( 8.0 );
// returns true
bool = isCubeNumber( new Number( 8.0 ) );
// returns true
bool = isCubeNumber( 0.0 );
// returns true
bool = isCubeNumber( 1.0 );
// returns true
bool = isCubeNumber( 3.14 );
// returns false
bool = isCubeNumber( -5.0 );
// returns false
bool = isCubeNumber( NaN );
// returns false
bool = isCubeNumber( '0.5' );
// returns false
bool = isCubeNumber( null );
// returns false
```