DECLARATION(변수 선언하기)

variable(변수)

  • value that can be changed

after declaration, you can ‘ASSIGN’

FUNCTION(함수)

Function Declaration(함수 선언식)

Function Expression(함수 표현식)

PARAMETER(매개변수)

  • A variable that you will be used as an input at function

ARGUMENT(전달인자)

  • Output value that will be applied inside function

RETURN

  • Without return value inside function, the function will be undefined when console log it.

TYPE

String

Number

Boolean

  • true / false

Undefined

  • when value was not assigned

Function

ARRAY (배열)

OBJECT (객체)