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Arya Krishna
Arya Krishna

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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;
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  • A string is a series of characters and is surrounded by quotes
var myStringWelcome = "Hello World"; 
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  • A number can be either an integer or a decimal
var myNumberInt = 100;
var myNumberDecimal = 100.100;
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  • Booleans have two values: true or false
var isMyBooleanTrue = true;
var isMyBooleanFalse = false;
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JavaScript is loosely typed, so the type is tied to the value held in the variable, not the variable itself!

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