이 레슨은 당분간 영어로 제공돼요.
Write it once, use it everywhere
Turning points into a level, formatting a date, checking a username: each is a job you will do again and again. A function packs a job under a name.
이 레슨은 당분간 영어로 제공돼요.
Turning points into a level, formatting a date, checking a username: each is a job you will do again and again. A function packs a job under a name.