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

# oct

## Synopsis

```perl
$val = oct("77");       # 63
$val = oct("0xff");     # 255 (hex)
$val = oct("0b1010");   # 10  (binary)
$val = oct("0o77");     # 63  (explicit octal)
```

## Description

Interprets a string as an octal number, with automatic prefix dispatch.

Dispatches on prefix: `0x`/`x` for hexadecimal, `0b`/`b` for binary,
`0o` for explicit octal (Perl 5.34+), otherwise plain octal.
Underscores are allowed as digit separators. Leading whitespace is
stripped.

## See also

hex