Dear Monks, How can I quickly decide whether a variable holds a number or not a number?

When I run the following code, it throws a warning saying that Argument "abc" isn't numeric in int at C:\PERL\test.pl line 8. Of course, it isn't numeric! But how do I capture this warning and make my code do something different if it isn't numeric?

I don't want to use a regex or various string tests to see if the variable contains any non-numeric characters, because if it's a number, then perl has to convert the number to a string, and then it has to inspect each character of the string. I don't want to go down that route. Is there a faster way to test if a variable is a number? 

#!/usr/bin/perl -w

use strict;
use warnings;

my $X = "abc";

$X = int($X);

print $X;

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In reply to How to capture the "isn't numeric" warning? by harangzsolt33

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