Digging more into Variables in JavaScript

Now that we have a basic idea about the variable , we need to understand more about what goes inside those variable which are the different DataTypes.

Everything that we work inside of an application ultimately comes down to Primitive DataTypes.

• Primitive data types include undefined, string, number and boolean

• Undefined variables haven't been assigned values yet.If we put nothing inside a variable it is type of UnDefined.
  

var myUndefined;

• A string is a series of characters and is surrounded by quotes

var myStringWelcome = "Hello World"; 

• A number can be either an integer or a decimal

var myNumberInt = 100;
var myNumberDecimal = 100.100;

• Booleans have two values: true or false

var isMyBooleanTrue = true;
var isMyBooleanFalse = false;

JavaScript is loosely typed, so the type is tied to the value held in the variable, not the variable itself!