>>3
Only if you want to save your work.
I don't think most Lisps provide a way to save stuff entered at the repl. Generally a Lisper uses Emacs + Slime, which makes it easy to type code into another buffer and load it into your running Lisp, or some Lisp IDE that provides the same thing.
Some Lispers like to do their exploratory programming at the repl and have come up with programs that will save what you type, but I don't remember the program names or who's written such a thing since I don't do that. Google around and you may find it, but it's presumably too late for whatever you have typed thus far.