A simple integer-validation program. : Digit « Regular Expression « Perl

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Perl » Regular Expression » Digit

A simple integer-validation program.


    

#!/usr/local/bin/perl 



print ("Enter a number:\n"); 

$number = <STDIN>; 

chop ($number); 

if ($number =~ /^-?\d+$|^-?0[xX][\da-fa-F]+$/) { 

    print ("$number is a legal integer.\n"); 

} else { 

    print ("$number is not a legal integer.\n"); 

}

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