You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit a49f088345016a6ef606445afc5e9b34d493f8c3)
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.