This is used to concat two sequences together.
Following is the syntax.
(concat seq1 seq2)
Parameters − ‘seq1’ is the first sequence list of elements. ‘seq2’ is the second sequence list of elements, which needs to be appended to the first.
Return Value − The combined sequence of elements.
Following is an example of concat in Clojure.
(ns clojure.examples.example (:gen-class)) ;; This program displays Hello World (defn Example  (def seq1 (seq [1 2])) (def seq2 (seq [3 4])) (println (concat seq1 seq2))) (Example)
The above program produces the following output.
(1 2 3 4)