---
title: "upper"
description: "Takes a string and returns an upper-case version of it."
---

# upper

> Takes a string and returns an upper-case version of it.

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

## Description
## Syntax
`upper(string)`

- Parameters

    - string **string** - The string to make uppercase.

- Results

    - string - The starting string with all characters uppercase.

## Examples
```python title="Code Snippet"
upper("Hello World") //returns "HELLO WORLD"
```