#!/usr/bin/perl

use strict;
use warnings;
use Scalar::Util;

my $str = 'XP';
print "$str does",
      Scalar::Util::looks_like_number($str) ? '' : ' not',
      " look like a number.\n";

[download]
yields: 
$ ./bs.pl
XP does not look like a number.

[download]
Tsk, tsk.
Matt

In reply to How Wrong You Are by mojotoad
in thread XP is just a number by gam3

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