---
name: lc
status: documented
runtime: pp
source: src/runtime/pp/strings/case.rs
---
```{index} single: lc; Perl built-in (pp runtime)
```

# lc

## Synopsis

```perl
$lower = lc($string);
$lower = lc('HELLO');   # "hello"
```

## Description

Converts a string to lowercase.

Returns a lowercased copy of STRING. For ASCII input, an in-place
byte mutation fast path avoids allocation when a TARG pad slot is
available. For Unicode input, Rust's `to_lowercase()` is used, which
handles case mappings that change byte length.

## See also

uc, ucfirst, lcfirst