Node.js #2- Variables and Declarations

Variables and Declarations

What is Variable?

• Variable are the names which hold the data.

 

Noteworthy:

·         Variable stores a single data value that can be changed later.

·         Variables can be defined using var keyword. Variables defined without var keyword become global variables.

·         Variables must be initialized before using.

·         Multiple variables can be defined in a single line. e.g. var one = 1, two = 2, three = "three";

·         Variables in JavaScript are loosely-typed variables. It can store value of any data type throughout its life time.

Syntax:

var <variable-name>;

var <variable-name> = <value>;

Source code:

var a=10

console.log(a)

Output:

10

 

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