https://youtu.be/OCCpGh4ujb8 변수 선언 : let(mutable) vs const(immutable) // 2. Variable // let (added in ES6) rw(read/write 둘다 가능) let globalName = 'global name' { let name = 'ellie'; console.log(name); name = 'hello'; console.log(name); console.log(globalName); } console.log(name); console.log(globalName); // var (don't ever use it) // var hoisting (move declaration from bottom to top) // has no b..
