I happen to have written a module which understands that syntax. You could use it like this:

use strict;
use warnings;
use 5.010;
use Math::Expression::Evaluator;

my $m = Math::Expression::Evaluator->new;
# read all the variables
$m->parse("x1=3.8; x2=5.8; x3=4.1; y1=10.1; y2=11.6; y3=12.7")->val;

# do the calculations you are interested in:
say $m->parse("x1 *  x2")->val;

[download]

Not saying it's the best solution, it just happens to work :-)

Perl 6 - the future is here, just unevenly distributed

In reply to Re: How can I enter the data of different variables from a text file into a perl program? by moritz
in thread How can I enter the data of different variables from a text file into a perl program? by supriyoch_2008

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.