#！/usr/bin/perl

# I am a comment.

$my_var=20;

>>> print "Hello World\n";  # \n -> new line

Hello World

>>> print 'Hello World\n';

Hello World\n

>>> print "\nValue of my variable: $my_var";

Value of my variable: 20

>>> print '\nValue of my variable: $my_var';

\nValue of my variable: $my_var