I also had that experience with emacs, which has a built in help system. I couldn't find a topic on 'exit' or 'quit' and refused to just search online.
No, I think that exits. C-c k kills the buffer, C-x 0 (zero) will kill the frame. But I may have changed my binds and can never remember which is window and which is frame in emacs terms.
However, it’s somewhat moot as just about everywhere you run emacs, it’ll open up in gui mode and you can use the file menu. (Or use F10 to bring up the menus in terminal, but I have no idea where on the manual it would say that)