What are the data types supported by JavaScript

EcmaScript standard defines 7 data types. Out of these 7, six are primitive types.

Primitive Types

Below table summarizes the primitive types supported by JavaScript.

Type	Description	Possible Values
boolean	It used to represent true, false states.	true, false
null	Specifies the absence of an object value.	null
undefined	If you do not assign a value to the variable, then the value of the variable is undefined	undefined
Number	Represent an integer (or) floating point number.	At the time of writing this post, JavaScript supports, numbers between -(253 -1) and 253 -1
String	It is a collection of characters, used to represent textual data.	Any text data
Symbol	Symbols are unique and immutable.	Example const symbol1 = Symbol(); const symbol2 = Symbol(123); const symbol3 = Symbol("Hello");

Object type

An object is a collection of properties. If you have any complex data, you can represent it as object.

HelloWorld.js

var state = true;

var x = null;
var y;

var PI = 3.14;

var message = "Hello World";

var symbol1 = Symbol(123);

var employee = {
  "name" : "krishna", 
  "city" : "Bangalore",
    
    toString: function() {
      return "[name = " + this.name + ", city = " + this.city + "]";
    }
};

console.log("state : " + state);
console.log("x : " + x);
console.log("y : " + y);
console.log("PI : " + PI);
console.log("message : " + message);
console.log("symbol1 : " + symbol1.toString());
console.log("employee : " + employee.toString());

Output

state : true

x : null

y : undefined

PI : 3.14

message : Hello World

symbol1 : Symbol(123)

employee : [name = krishna, city = Bangalore]

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