if vs. when2021. 7. 31.
(if expr "True" nil)(if expr "True" nil)(when expr "True")(when expr "True")위 둘은 같음.
(if expr "True" nil)(if expr "True" nil)(when expr "True")(when expr "True")위 둘은 같음.
(+ 1 2 3 4) ;; <1>
'(+ 1 2 3 4) ;; <2>(+ 1 2 3 4) ;; <1>
'(+ 1 2 3 4) ;; <2>