ex1_1.scm

; Exercise 1.1.  Below is a sequence of expressions. What is the result printed by the interpreter in 
; response to each expression? Assume that the sequence is to be evaluated in the order in which it is 
; presented. 

10
; => 10
(+ 5 3 4)
; => 12
(- 9 1)
; => 8
(/ 6 2)
; => 3
(+ (* 2 4) (- 4 6))
; => 6
(define a 3)
(define b (+ a 1))
(+ a b (* a b))
; => 19
(= a b)
; => false
(if (and (> b a) (< b (* a b)))
    b
    a)
; => 4 (b)
(cond ((= a 4) 6)
      ((= b 4) (+ 6 7 a))
      (else 25))
; => 16
(+ 2 (if (> b a) b a))
; => 6
(* (cond ((> a b) a)
         ((< a b) b)
         (else -1))
   (+ a 1))
; => 16