Update:I mis cut and pasted the main link. Perl Documentation:perlvar
and the quote from it but it sums itself up well.

From: Perl Documentation: perldata

Names

Names that start with a digit may contain only more digits. Names that do not start with a letter, underscore, digit or a caret (i.e. a control character) are limited to one character, e.g., $% or $$. (Most of these one character names have a predefined significance to Perl. For instance, $$ is the current process id.)

From: Perl Documentation: perl

Bugs

While none of the built-in data types have any arbitrary size limits (apart from memory size), there are still a few arbitrary limits: a given variable name may not be longer than 251

"No matter where you go, there you are." BB

In reply to Re: Very quick question about names in perl by Ninthwave
in thread Very quick question about names in perl by dakedesu

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.