There is something called package scope. In each point in time, perl code is in exactly one package scope.

There is something pretty different called lexical scope. In each point of time, perl code can be in one or more lexical scopes. Lexical scopes are distributed into nested lexical scopes.

my $outer = 1; # lexical file scope
{
  my $inner = 1;
  # here I can see both $inner and $outer
  # as $outer is "inherited" from the outer
  # lexical scope
  {
    my $inner = 2; 
    # this $inner is completely different $inner
    # than the $inner in the direct outer scope
    # but still I can see $outer
  }
  # now I can see $inner that is equal to 1
}
# now I can see only $outer

[download]
For additional reading, I recommend perlsub, namely "Private Variables via my()".

In reply to Re: Using an "outer" lexical in a sub? by holcapek
in thread Using an "outer" lexical in a sub? by cornballer

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.