File type extension

Programs are saved as 'File' on the PC (Real PC) but what is the exact extension called?

Example, Text document = .txt

There is no extension, it's just a raw file.
Extensions just "mark" certain files as a specific type, so it'll be opened with the standard program for that type of file.

If you're talking about CC files, they have no extension. Lua files have .lua extension

You could save it as whatever filetype you wish, and your computer would treat it accordingly. Just add ".whatever" to it.

ok so no extension, no .filetypehere

ok so when im making a new program in notepad++ what should i save it as? shall i just delete the file extension or….?

As CometWolf pointed out, it doesn't matter.
If you save it as yourprogram.txt, type yourprogram.txt in the shell to run the program.
If you save it as yourprogram.thisisawesome, type yourprogram.thisisawesome in the shell to run the program.

With or without file extension, it's just a name, so it simply doesn't matter. Do it the way you like :P/>

Ah I understand now!

Ooooo I can create my own extension! Interesting!