(defn get-latitude [] 42)

(def latitude (get-latitude))

;; the very same chain written with plain ifs: the else branch of one if
;; holds the next if. It works, and it is exactly why cond exists —
;; every extra branch costs one more level of nesting
(def location
  (if (= latitude 0)
    "Equator"
    (if (= latitude 90)
      "north Pole"
      (if (= latitude -90)
        "south Pole"
        "not at the Equator or Pole"))))
;; location is "not at the Equator or Pole"

(println "latitude" latitude "is" location)