What is ' (apostrophe) in Lisp / Scheme?

Question

I am on day 1 hour 1 of teaching myself Scheme. Needless to say, I don\'t understand anything. So I\'m reading The Little Schemer and using this thing:

Answer 1

The single-quote character is shorthand way of saying (quote foo) where quote is the form to return just foo without evaluating it.

One thing to really remember in Scheme or any Lisp for that matter is that everything is evaluated by default. So, in cases where you don't want to evaluate you need a way to sat this.

Quoting something does just this and the single-quote is just requires less typing and leads to less verbose code.