gistfile1.clj

;; Dynamic just means I can use the binding function with it, otherwise it will complain.
(def ^:dynamic x 11)

(defn func1
  []
  (println x))

(func1) ;; Prints 11

(binding [x 22]
  (func1))

;; Prints 22

(func1) ;; Prints 11

;; With the binding function, x only takes on the value within the scope of that function.
;; By default, there is no mutation possible.