How do I play the turn in Fur Elise

As you will see in the attachment, there's what I presume to be a Turn sign (that flattened and backwards S, rotated 90º) at the top of the page, with no note beneath it.

Please tell me how to play it and when (i.e., on which note in the Bass Clef).

I could wait until my teacher comes tomorrow to find out, but this would give me a headstart. So I hope you don't mind my asking.

Shouldn't there be an Alt Character for this Turn symbol? Like the degree sign up there (º).

If you don't know what Alt Characters are and...

You want to type 90º, first type the 90, then without moving the cursor, hit numlock on your keypad. Then hold down the Alt key, and on the key pad type 167. You can do this here in a post or in a Word Processor, or whatever. There are several Alt Character pages available on the web. If you want to explore the possibilities try

http://www.tedmontgomery.com/tutorial/ALTchrc.html

or simply Google on Special Alt Characters. They'll show you a grid of them. Maddeningly there doesn't seem to be a rigid system for the way the characters are arranged on the grid, so you often must look long and hard to find what you want.

There are a lot of these Alt Characters that aren't on your standard keyboard: ½, ¼, and if you want to show off your Español, you can make those curlycued n's all day long. ¿, too, as well as upside down Excamation points and even ®. Good stuff.

½ (Alt 171)
¼ (Alt 172)
ñ (Alt 164)
¿ (Alt 168)
® (Alt 0174)

I didn't include the ¡ because I don't really know if it's an upside down Exclamation Point. If it is, it's pretty week. Go search. Maybe you'll find a better one. Okay okay, it's Alt 173,
but I don''t like it, and it might well be wrong.