Clojure cond语句

// 
(ns clojure.examples.hello
   (:gen-class))

;; This program displays Hello World
(defn Example []
   (def x 5)
   (cond
      (= x 5) (println x is 5)
      (= x 10)(println x is 10)
      :else (println x is not defined)))
(Example)