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#!/usr/bin/perl -w use strict; my @numbers = ('-1', 1, 1000, '0001', 'abc', 34, '0x65', "1.2", '3.', '.3'); sub is_numeric { return $_[0] =~ /^[1-9][0-9.]*$/ } for (@numbers) { if (is_numeric($_) ){ print "$_ is numeric\n"; } else { print "$_ is NOT numeric\n"; } } __END__ -1 is NOT numeric 1 is numeric 1000 is numeric 0001 is NOT numeric abc is NOT numeric 34 is numeric 0x65 is NOT numeric 1.2 is numeric 3. is numeric .3 is NOT numeric

In reply to Re: How to determine if something is numeric? by Anonymous Monk
in thread How to determine if something is numeric? by mifflin

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