I explore the Clojure language

To program in Clojure i use Emacs with Cider, Lein and Ubuntu 20.04 LTS Operating System

Let's create a new project with the command: lein new app hello-world

Open the file hello-world/src/hello_world/core.clj with Emacs
The file contains the classic Hello World program

(ns hello-world.core
  (:gen-class))

(defn -main
  "I don't do a whole lot ... yet."
  [& args]
  (println "Hello, World!"))

To run the program: lein run

This is the result:
Hello, World!