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

# ucfirst

## Synopsis

```perl
$result = ucfirst($string);
$result = ucfirst('hello');   # "Hello"
```

## Description

Uppercases the first character of a string.

Returns a copy of STRING with the first character converted to
uppercase and all other characters left unchanged. For ASCII first
characters, a single-byte in-place mutation is used. For Unicode
first characters, `to_uppercase()` may produce multiple characters
(e.g. the `ffi` ligature U+FB03).

Returns an empty string when given an empty string.

## See also

lcfirst, uc, lc