Excellent question. I like when questions like this appear because sometimes making basic points clear helps beginners to learn and advanced programmers to remember.
Logging is a very important part of any system. I'm probably being repetitive, but I usually use it for:
my
($author_nickname, $author_email) = ("DaWolf","erabbott\@terra.com.br")
if ($author_name eq "Er
Galvão Abbott");