사전스터디

\--The var keyword is used in pre-ES6 versions of JS.\--let is the preferred way to declare a variable when it can be reassigned.\--const is the prefe

\-- 가변객체 mutable : 할당된 값을 수정 가능 O ex) list, set, dict 불변객체 immutable : 할당된 값 수정 X ex) int, float, bool, str, tuple \` a = 0, 10, 20, 30, 40,