are web domains a must when hosting a public website?

[Nyap]

So I'm learning HTML so I can make my own website, which I plan to host on an odroid (its similar to the raspberry pi, look it up). My question is; can I host a website without a web domain that other's can access? So they would have to type in an ip address instead of an easy-to-remember web address

sorry if it's a dumb question ._.

 

[evandixon]

It's possible if your firewall allows it, and your router has the proper port forwarding.

I would recommend freedns.afraid.org here. You can get a free subdomain so you don't have to use just an IP.