$ perldoc -q decimal 
Found in /opt/perl/lib/5.8.1/pod/perlfaq4.pod
       Why am I getting long decimals (eg, 19.9499999999999)
       instead of the numbers I should be getting (eg, 19.95)?

               Internally, your computer represents floating-
               point numbers in binary. Digital (as in powers of
               two) computers cannot store all numbers exactly.
               Some real numbers lose precision in the process.
               This is a problem with how computers store numbers
               and affects all computer languages, not just Perl.

               perlnumber show the gory details of number repre-
               sentations and conversions.

               To limit the number of decimal places in your num-
               bers, you can use the printf or sprintf function.
               See the "Floating Point Arithmetic" for more
               details.

                       printf "%.2f", 10/3;

                       my $number = sprintf "%.2f", 10/3;

[download]

Abigail

In reply to Re: For loop wierdness by Abigail-II
in thread For loop wierdness by alexg

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.