If, Cond, and When

(doc <)
(< 1 2)
(< 2 1)
(if
  (< 1 2)
  "hi!"
  "bye!")
(if
  (< 2 1)
  "hi!"
  "bye!")
(< 1 2 3 4 5 6)
(< 1 3 2 4 5 6)
(cond
  (< 2 1) "hi!"
  (< 18 2) "hello!"
  :else "yo!")
(when (< 2 1)
  (println "Hi!")
  (println "Hello!")
  (println "Howdy!"))