---
title: "isNull"
description: "Tests to see whether or not the argument value is null"
---

# isNull

> Tests to see whether or not the argument value is null

**This function is used by Ignition's Expression language.**
## Description
Tests to see whether or not the argument value is null. Note that you can also check for null by simply comparing the value to the null keyword. isNull(x) is the same as x = null.
## Syntax
`isNull(value)`

- Parameters

    - object **value** - A value to check if it is null.

- Results
    - Bool - True if the value is null, False if it is not.

## Examples
```python title="Code Snippet"
 if(isNull({Root Container.MyProperty}), 0, 1) //returns 0 if the property is null, 1 otherwise.
```