Data Types (JavaScript):



Primary Data Types

The primary (primitive) data types are:

String, Number, Boolean



Composite Data Types

The composite (reference) data types are:

Object, Array



Special Data Types

The special data types are:

Null, Undefined

Click here for details:

  var test1 = 1;

  var test2 = Something;

  var test3 = true;

  var test4 = {};

  var test5 = new Array();

  var test6 = new Date();

  var test7;

  var test8 = null;



  alert(typeof (test1)); //number

  alert(typeof (test2)); //string

  alert(typeof (test3)); //boolean

  alert(typeof (test4)); //object

  alert(typeof (test5)); //object

  alert(typeof (test6)); //object

  alert(typeof (test7)); //undefined

  alert(typeof (test8)); //object