Following this advice I modified your program with 
use strict;
use warnings;

[download]
extra output was
Argument "Y" isn't numeric in numeric eq (==) at - line 14.
Argument "N" isn't numeric in numeric eq (==) at - line 14.

[download]
Use eq to commpare strings, == for numbers. See perlintro, perlop.

In reply to Re: Unexpcted answer by Anonymous Monk
in thread Unexpcted answer by northwestdev

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