syntax error at ./test.pl line 3, near "$v{u"

The reason the this is a syntax error is that you cannot declare one element of an array or hash with my.

Athanasius has already given you great examples of working code.

To add...Perl has three basic data types: scalars, arrays and hashes:
scalars hold a single value and are of the form $scalar
arrays hold an ordered list of values and are accessed individually as $array[n] where n is the index in the list. They are accessed as a whole list using @array
finally hashes are unordered lists accessed by a key. Individually they are $hash{key} and as a complete hash with %hash.

In reply to Re: Variable with curly braces? by Bod
in thread Variable with curly braces? by wyt248er

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.