exercise_1.01

Sequence of expressions:
Scheme | Elixir | Result
10 | 10 | 10
(+ 5 3 4) | 5 + 3 + 4 | 12
(- 9 1) | 9 - 1 | 8
(/ 6 2) | div(6, 2) | 3 # Using div here to return an int, matching Scheme
(+ (* 2 4) (- 4 6)) | 2 * 4 + 4 - 6 | 6 |
(define a 3) | a = 3 | 3
(define b (+ a 1)) | b = a + 1 | 4
(+ a b (* a b)) | a + b + a * b | 19
(= a b) | a == b | false
(if (and (> b a) (< b (* a b))) | if (b > a) && (b < (a * b)) do | 4
    b                           |   b
    a)                          | else
                                |   a
                                | end
(cond ((= a 4) 6)               | cond do               | 16
      ((= b 4) (+ 6 7 a))       |   a == 4 -> 6
      (else 25))                |   b == 4 -> 6 + 7 + a
                                |   true -> 25
                                | end
(+ 2 (if (> b a) b a)) | 2 + if (b > a) do b else a end | 6
(* (cond ((> a b) a) | cond do       | 16
         ((< a b) b) |   a > b -> a
         (else -1))  |   a < b -> b
    (+ a 1))         |   true -> -1
                     |  end * (a + 1)