This should give you a fairly accurate answer i.e. suppress warnings locally and compare the value to itself after adding a numeric value to it. 
use strict;
use warnings;

my $integer = 777;
my $string  = 'hello';
my $float   = 3.22 + 4.34;

print _isNumeric($integer) . "\n";
print _isNumeric($string) . "\n";
print _isNumeric($float) . "\n";

sub _isNumeric {
        my ($value) = @_; 

        no warnings;

        return 1 if ($value + 0) eq $value;
        return 0;
}

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In reply to Re: How to check if a scalar value is numeric or string? by bluestar
in thread How to check if a scalar value is numeric or string? by bgupta

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