# libpointer\_isNull

Checks if libpointer handle points on NULL pointer.

## Syntax

* tf = isNull(h)
* tf = h.isNull()

## Input argument

* h - a libpointer handle.

## Output argument

* tf - a logical.

## Description

Checks if libpointer handle points on NULL pointer.

## See also

[libpointer](libpointer).

## Example

```matlab
p = libpointer('int8Ptr', int8([3 4]));
p.isNull()
p2 = libpointer()
p2.isNull()
isNull(p2)
```

## History

| Version | Description     |
| ------- | --------------- |
| 1.0.0   | initial version |

## Author

Allan CORNET
