print FO "\x{00b9}"; # Outputs a strange character (the code for 00b9 is a superscript 1}

This works fine for me on Perl v5.20.3:

$ cat uniprint.pl 
#!/usr/bin/env perl 
use strict;
use warnings;

open my $out, '>:utf8', 'test.txt';
print $out "Hello\x{00b9}\n";
close $out;
$ ./uniprint.pl 
$ cat test.txt
Hello¹
$ hexdump test.txt
0000000 6548 6c6c c26f 0ab9                    
0000008
$

If you get different output from the hexdump, that would be informative to see. If the hexdump is the same, but the cat output doesn't match then your terminal or locale is probably to blame.

In reply to Re: Printing a UTF8 code by hippo
in thread Printing a UTF8 code by bobt_1234

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.