In general Perl has a philosophy of "Do what I mean" (DWIM). In the context of numbers and strings Perl converts numbers to strings in a string context and converts strings to numbers in a number context.

What determines the context?

  • Hash keys are strings so are a string context
  • Hash values are either
  • arithmetic operators provide a number context
  • string operators (., cmp, eq, gt ...) provide a string context

    You can force a number context by using +0 and string by .'' (empty quoted string):

    my $NumericValue = "10" + 0;
my $StringValue = 10 . '';

    [download]
    Perl is Huffman encoded by design.

    In reply to Re: Adding hash values together by GrandFather
    in thread Adding hash values together by MonkPaul

    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.