1---
2layout: "language"
3page_title: "lower - Functions - Configuration Language"
4sidebar_current: "docs-funcs-string-lower"
5description: |-
6  The lower function converts all cased letters in the given string to lowercase.
7---
8
9# `lower` Function
10
11`lower` converts all cased letters in the given string to lowercase.
12
13## Examples
14
15```
16> lower("HELLO")
17hello
18> lower("АЛЛО!")
19алло!
20```
21
22This function uses Unicode's definition of letters and of upper- and lowercase.
23
24## Related Functions
25
26* [`upper`](./upper.html) converts letters in a string to _uppercase_.
27* [`title`](./title.html) converts the first letter of each word in a string to uppercase.
28