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

# lcfirst

## Synopsis

```perl
$result = lcfirst($string);
$result = lcfirst('HELLO');   # "hELLO"
```

## Description

Lowercases the first character of a string.

Returns a copy of STRING with the first character converted to
lowercase and all other characters left unchanged. For ASCII first
characters, a single-byte in-place mutation is used. For Unicode
first characters, `to_lowercase()` may change the byte length.

Returns an empty string when given an empty string.

## See also

ucfirst, uc, lc