not

function

since v0.0-927

clojure.core/not

(not x)

Details:

Returns true if x is logical false, false otherwise.

See Also:

Source docstring:

Returns true if x is logical false, false otherwise.

Source code @ clojurescript:src/main/cljs/cljs/core.cljs

(defn not
  [x]
  (cond
    (nil? x) true
    (false? x) true
    :else false))