hello.pl —x Prints the message using two different delimeters.

A UNIX Command

$cat hello.pl
# Prints the message using two different delimeters.
print "Hello, world!\n";
print qq=Did you say "Hello?"\n=;

$perl hello.pl
Hello, world!
Did you say "Hello?"
$

UNIX Explanation

"print"  is  categorized  under  Input/Output Functions.
Prints the message using two different delimeters.

source : http://sandbox.mc.edu/~bennet/perl/leccode/index.html