"whileL.pl" 24 lines, 404 characters

I second cbu's comment: very unhelpful! If your example program is aimed at beginners, then even more unhelpful in spreading bad programming habits. In addition to what the other poster wrote, since we recommend people all the time not to try to reinvent the wheel risking to do so wrongly and to use CGI instead, you may want to do so. Even for such a tiny thing.

Since your code has already been rewritten in a better way, I'll comment on the title, which is also particularly unhelpful - "Simple Perl programme using":

• bad spelling: it's "program", not "programme";
• not only it's not a well formed English phrase at all, but one can not even guess what it is about;
• CGI is not mentioned at all, but it's in fact what it is about, so it supports the Perl eq CGI pov.

As far as the first two points are concerned, I understand that English may not be your mother tongue: neither is it mine, but special care should be applied at least when composing titles, if not all the rest. As for the second, that pov is often associated with stuff that gives Perl a bad name so it is generally deprecated amongst Perl programmers: granted, it's better tolerated here than elsewhere, but it is still wrong.