You are viewing the version of this documentation from Perl blead. This is the main development branch of Perl. (git commit c4da28b08df3461eac29d13049528fd0df1a1e05)
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.