4.3. Environment

On the command line one can type:

perl -e "print 42"

perl -v

perl -V

#!/usr/bin/perl
use strict;
use warnings;

print "Hello world\n";
print 42, "\n";

On unix you can also make it executable: chmod u+x hello_world.pl and then run like: ./hello_world.pl

A couple of notes

• Strings and numbers

• Strings must be quoted, you can use special characters such as "\n"

• The print statement (Output) - gets comma delimitered list of things

• ; after every statement