A string containing just decimal digits, can only be a number.
You could just as easily say a string containing just octal, or binary or hexadecimal digits, can only be a number.

A decimal number might be a "leetspeak" word if you were wanting to be cryptic.

Perl determines from *context* if the user is trying to use a variable as a number or a string. If the user tries to perform addition on a string -- it tries to see if the string looks like a number and allows it if it does. But there is no reason it needs to be limited to decimal digits. This is even more evident if you consider octal digits as an example. Using a rule of 'leading 0' for octal or 'leading 0x' for hex seem fairly safe -- can you give an example where doing so would be a problem?

Come-on BuK, question the status quo! ;-)


In reply to Re^6: why are hex values not numbers? by perl-diddler
in thread why are hex values not numbers? by perl-diddler

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.