Tutorial/oc2 writing code

OC Tutorial: Writing Code

So, you've built your first computer and wonder what to do with it?

Well, let's start with the good old, proven, beloved first program. You know which one. First off, let's switch to the `/tmp` folder, which is a small, writable file system each computer comes with. Remember, this gets wiped on reboot, so don't put anything valuable in here!

https://i.imgur.com/7YdcUbE.png

As shown in the image, type `edit <filename>`, where `filename` is the name of the file you wish to edit. The `.lua` extension is absolutely optional, I just like to keep it for syntax highlighting when opening the files in an external editor.

Once in the editor, start coding. In our case it's just the boring, uncreative-but-proven `print("Hello World!")`.

https://i.imgur.com/5F16EEV.png

When you're done, press Ctrl+S to save, then press Ctrl+W to close the editor. If you list the contents of the `/tmp` folder now, you'll see the file has been created. Type its name and press enter to run it:

https://i.imgur.com/KiHVUMu.png

Notice that I didn't type the `.lua` extension when running it. The shell will look for files with that extension if it can't find the file with the exact name you specified.

If want your programs to survive reboots, continue by reading on how to use hard drives.

Contents

Tutorials	Category	Documentation
Tutorials	Mod Specific	Basic Computer - Writing Code - Hard Drives - Autorun and Startup scripts
	Modding	Custom Architectures - IMC Messages - API changes in OC 1.3 - API changes in OC 1.4 - Build and Run master-MC1.7.10 from source
	Programs	OPPM - install
	Others	Custom Operating Systems