$ which perl
/usr/bin/perl
####
# hello.pl
# - Displays a warm greeting
print "Hello, World!\n";
##
##
# hello.pl
# Displays a warm greeting.
##
##
$ perl hello.pl
Hello, World!
$
##
##
print "Hello, World!";
##
##
$ perl hello.pl
Hello, World!$
##
##
# hello.pl
# Displays a warm greeting.
my $name = "Brian";
print "Hello, $name!\n";
##
##
$ perl hello.pl
Hello, Brian!
$
##
##
my $name = "Brian"; # My scalar variable called 'name' has the value "Brian"
##
##
print "What is your name? ";
my $name = ;
print "Hello, $name!\n";
##
##
$ perl hello.pl
What is your name? Brian
Hello, Brian
!
$
##
##
print "What is your name? ";
my $name = ;
chomp($name);
print "Hello, $name!\n";
##
##
$ perl hello.pl
What is your name? Brian
Hello, Brian!
$