perldoc -f say

... "say" is available only if the "say" feature is enabled or if it is prefixed with "CORE::". The "say" feature is enabled automatically with a "use v5.10" (or higher) declaration in the current scope.

So you could add 

use v5.10;   # or higher
...

[download]
or 
use feature qw(say);
...

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or 
$_ = 'My name is Paquito';
CORE::say if /My name is/;

s/Paquito/Paquita/;

tr/A-Z/a-z/;
CORE::say;

[download]

Had you add use strict; the following warning would have been issued hinting that say is unknown: 

Bareword "say" not allowed while "strict subs" in use at ./say.pl line
+ xyz.

[download]

In reply to Re: Modern Perl Book "Paquito" Example Question by Perlbotics
in thread Modern Perl Book "Paquito" Example Question by Ayber

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