Type it where? Run it how? Where did the code come from and what do you expect it to do? What do you want it to do?

What operating system are you using? Are you using a Perl that came with the OS, or have you installed it yourself (how and where from?)? What editor are you comfortable with? Do you know how to run stuff from the command line?

Ok, so that's a lot of questions, but we really can't tell what you know or what you have so it's hard to give good advice and it's hard to know what you mean by your questions without some understanding of where you are coming from.