I'm not sure if you're any more familiar with Java. As a first step to understanding how Perl works, you can consider that it compiles and runs in a somewhat similar way to Java, except that while Java has two commands, 'javac' and 'java', Perl just has one, 'perl' that compiles and then immediately runs the result.
The complete story is more complicated, since Perl can also compile code on the fly even after the run phase has started (and can run code before the compile phase has completed). This is truly powerful, but difficult to wrap your head around.
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