While knowing the history of a new language and especially its structure is important (and sometimes boring), having an overview of how things work in practice and writing some code is always more fun.
The first important step in learning a new language is to have your initial environment set up before you get started.
After following the necessary installation steps, run to your terminal and type clj to get started:
Clojure 1.10.1
user=> (println "Hello, world!")(+ 4 3)
(+ 14 7)
(- 49 21)
(- 2 14)
(* 3 7)
(* 7 21)
(/ 70 7)
(/ 21 3)
(* (+ 3 4) 7)
(+ (- 2 1) 28)
(- (* 21 3) 7)
(/ (+ 4 3) 21)(if true
:truthy
:falsey)
(if (= (+ 1 1) 2)
"Then true"
"Opitional else value")
(let [x 7]
(cond
(< x 2) "x is less than 2"
(< x 10) "x is less than 10"))
(let [x 14]
(cond
(< x 2) "x is less than 2"
(< x 10) "x is less than 10"
:else "x is greater than or equal to 14"))
(when true
(println "Success!")
"Awesome too!")
(defn foo
[c]
(case c
5 "c is 5"
10 "c is 10"))
;; user=> (foo 5)
(defn foo
[c]
(case c
5 "c is 5"
10 "c is 10"
"c isn't 5 or 10"))
;; user=> (foo 14)(dotimes [i 7]
(println i))
(doseq [n (range 3)]
(println n))
(for [letter [:a :b]
number (range 3)]
[letter number])
(loop [i 0]
(if (< i 10)
(recur (inc i))
i))(try
(/ 2 1)
(catch ArithmeticException e
"divide by zero")
(finally
(println "cleanup")))
(try
(throw (ex-info "There was a problem" {:detail 42}))
(catch Exception e
(prn (:detail (ex-data e)))))This project is licensed under the MIT License.
