=over

=item chr NUMBER

=item chr

Returns the character represented by that NUMBER in the character set.
For example, C<chr(65)> is C<"A"> in either ASCII or Unicode, and
chr(0x263a) is a Unicode smiley face (but only within the scope of
a C<use utf8>).  For the reverse, use L</ord>.  
See L<utf8> for more about Unicode.

If NUMBER is omitted, uses C<$_>.

=back