oct - convert a string to an octal number

- NAME
- SYNOPSIS
- DESCRIPTION

# NAME

oct - convert a string to an octal number

# SYNOPSIS

oct EXPR

oct

# DESCRIPTION

Interprets EXPR as an octal string and returns the corresponding value. (If EXPR happens to start off with `0x`, interprets it as a hex string. If EXPR starts off with `0b`, it is interpreted as a binary string. Leading whitespace is ignored in all three cases.) The following will handle decimal, binary, octal, and hex in the standard Perl or C notation:

        $val = oct($val) if $val =~ /^0/;

If EXPR is omitted, uses `$_`. To go the other way (produce a number in octal), use `sprintf()` or printf():

        $perms = (stat("filename"))[2] & 07777;
        $oct_perms = sprintf "%lo", $perms;

The `oct()` function is commonly used when a string such as `644` needs to be converted into a file mode, for example. (Although perl will automatically convert strings into numbers as needed, this automatic conversion assumes base 10.)

oct - convert a string to an octal number