Another way :

#!/usr/bin/perl -w
use strict;

print ' AB in 10 base => ', base10('AB'), "\n";
print ' IV in 10 base => ', base10('IV'), "\n";

sub base10{
    my ( %base26, @letters, $sum );
    @letters = reverse split '', shift;
    @base26{ 'A'..'Z' } = 1..26;
    $sum += $base26{ $letters[$_] } * 26**$_ for 0..$#letters;
    return $sum;
}
__END__ 

 Output :
 AB in 10 base => 28
 IV in 10 base => 256

[download]

hth,
PooLpi

'Ebry haffa hoe hab im tik a bush'. Jamaican proverb

In reply to Re: Converting "IV" from base 26 by poolpi
in thread Converting "IV" from base 26 by pc88mxer

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.