How do I set up host name?

[ladyhesper]

Hi, I'm new to hosting and all this. 

I want to set up what I think is called a "host name". My domain name is sithempire.net. I want to set up a "host name" that is forums.sithempire.net, that will later be connected to the Xenforo forums platform. 

What is the correct terminology for this, and how do I set this up? 

[Nate · Accepted solution]

Yes, when used for a website it's commonly referred to as a sub-domain. 

If you use cPanel from GoDaddy, here are the steps to set one up.

https://www.godaddy.com/help/add-a-subdomain-to-my-linux-hosting-account-19991

If you use some other host they'll provide an A or CNAME record you'll need to add to the domain.

https://www.godaddy.com/help/create-a-subdomain-4080

Host/name: forms

Points to/value: (provided by host)