A single sentence is a simple Scheme program. For example:
> (* (+ 4 5) (- 3 2)) 9Functions may be defined as compound sentences involving the special words define and lambda. For example:
(define square (lambda (x) (* x x)))Then
> (square 10) 100Data is described using the special word quote as follows:
(define people (quote ((Clinton (president United States)) (Dole (wanted to be President)) (Perot (also wanted to be President))))) > (length people) 3