# Identity Function
> Identity function.
## Usage
```javascript
var identity = require( '@stdlib/utils/identity-function' );
```
#### identity( x )
Returns `x`.
```javascript
var v = identity( 3.14 );
// returns 3.14
var input = [];
var output = identity( input );
var bool = ( input === output );
// returns true
```
## Examples
```javascript
var identity = require( '@stdlib/utils/identity-function' );
var v = identity( 3.14 );
// returns 3.14
v = identity( true );
// returns true
v = identity( null );
// returns null
v = identity( void 0 );
// returns undefined
v = identity();
// returns undefined
```