---
title: "fromHex"
description: "Returns an integer value of the hex formatted string argument."
---

# fromHex

> Returns an integer value of the hex formatted string argument.

**This function is used by Ignition's Expression language.**

## Description
Returns an integer value of the hex formatted string argument. Numbers outside of the range (-2<sup>31</sup>) - (2<sup>31</sup>-1), and strings that are not hex numbers, return null.

## Syntax
`fromHex(string)`

### Parameters

| Type | Parameter | Description |
|---|---|---|
| String | `string` | A string representation of a hex value. |

### Results
**Integer** - The integer of the hex value.

## Examples
```python title="Code Snippet"
fromHex("ff") //returns 255
```
```python title="Code Snippet"
fromHex("0xff") //returns 255
```
```python title="Code Snippet"
fromHex("-ff") //returns -255
```