When I hit the “enter” key, it just goes to the next line and doesn’t evaluate the expression.

I tried searching to see if anyone else had experienced this, but I can’t find anything. My bad if this is a simple question, but I just haven’t been able to figure it out.

It’s inconvenient, because oftentimes, there is no M-x equivalent of an S-expression, so I have no way to do something that requires a call to an Emacs Lisp function.