Returns the character represented by that NUMBER in the character set.
in either ASCII or Unicode, and
chr(0x263a) is a Unicode smiley face. Note that characters from 128
to 255 (inclusive) are by default not encoded in UTF-8 Unicode for
backward compatibility reasons (but see encoding).
If NUMBER is omitted, uses
For the reverse, use ord.
Note that under the
pragma the NUMBER is masked to
the low eight bits.