Data Type Reference

• turned_in_notData Types

  Data Type	Used	typeof
  Boolean	true or false , 1 or 0	boolean
  Number	1	number
  String	"hello"	string
  Array	[1,2,3]	object
  Object	{a:1,b:2}	object
  Function	function ab( ){ }	function
  undefined	let z; undefined variables	undefined
  null	let z = null	object
  Map	new Map(), Advancement of Object	object
  Set	new Set([1,2,2,3]); results all unique values, advance to array	object
  WeakMap	Same as "Map" but with limited features	object
  WeakSet	Same as "Set" but with limited features	object
  Symbol	let z = Symbol("box")	symbol
  custom	with class and function	object