Modern Perl Book "Paquito" Example Question

[Ayber]

Has found myself in charge of maintaining some Perl web apps for a BioStatistics lab. Decided I should learn more about Perl to do so effectively. Picked up the book, "Modern Perl" 4e.

Have run a few examples from this book, but this one using the "it" doesn't do as expected. All that I have added to the code from the book is the shebang line. The code should print something, not quite sure what. Have tried perl 5.28.0 and 5.10.1 to the same result. The code runs, nothing prints. Am sure that I missing something quite simple here

#!/usr/bin/perl
    $_ = 'My name is Paquito';
    say if /My name is/;

    s/Paquito/Paquita/;

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

Code will run from terminal with no errors, no text is said in terminal. What context am I missing? Thank you for your time