This is used to create a new namespace and associate it with the running program.
Following is the syntax.
Parameters − ‘namespace-name’ is the namespace which needs to be associated with the running program.
Return Value − None.
Following is an example of ns in Clojure.
(ns clojure.myown (:require [clojure.set :as set]) (:gen-class)) (defn hello-world  (println *ns*)) (hello-world)
The above program produces the following output.
#object[clojure.lang.Namespace 0x50ad3bc1 clojure.myown]