You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit 1b72dea75a56a45f87c85e5ddd5e98dabaa6e272)
ord EXPR
ord

Returns the code point of the first character of EXPR. If EXPR is an empty string, returns 0. If EXPR is omitted, uses $_. (Note character, not byte.)

For the reverse, see chr. See perlunicode for more about Unicode.