---
layout: docs
page_title: lower - Functions - Configuration Language
sidebar_title: 'lower'
sidebar_current: configuration-functions-string-lower
description: >-
  The lower function converts all cased letters in the given string to
  lowercase.
---

# `lower` Function

`lower` converts all cased letters in the given string to lowercase.

## Examples

```
> lower("HELLO")
hello
> lower("АЛЛО!")
алло!
```

This function uses Unicode's definition of letters and of upper- and lowercase.

## Related Functions

- [`upper`](./upper.html) converts letters in a string to _uppercase_.
- [`title`](./title.html) converts the first letter of each word in a string to uppercase.