1---
2layout: docs
3page_title: lower - Functions - Configuration Language
4description: >-
5  The lower function converts all cased letters in the given string to
6  lowercase.
7---
8
9# `lower` Function
10
11`lower` converts all cased letters in the given string to lowercase.
12
13## Examples
14
15```shell-session
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`](/docs/job-specification/hcl2/functions/string/upper) converts letters in a string to _uppercase_.
27- [`title`](/docs/job-specification/hcl2/functions/string/title) converts the first letter of each word in a string to uppercase.
28