Overview of JavaScript

In this blog you will learn basic overview of JavaScript.

Introduction

 

JavaScript is a client-side scripting language basically used for validation. JavaScript at first used by Netscape Navigator. It is used to make well applications fast. JavaScript is a case sensitive language.

 

JavaScript can be used in three ways

1. Internal JavaScript
2. Inline JavaScript
3. External JavaScript

Syntax of JavaScript

<script language=” JavaScript”>
------------------------------
--------------------------------
</script>

Output

 

Document.write(); or

Document.writeln();

 

Data types in JavaScript

1. String
2. Number
3. Boolean
4. Array
5. Object
6. Null
7. Undefined

Variables in JavaScript

 

JavaScript variable can be assign with var keyword or without var keyword.

 

Like- var x; or x;

 

Example

 

 

Output: hello c# corner

 

Conditional statement

 

If-else

 

 

Switch statement

 

 

Looping in JavaScript

 

 

Output

 

Array in JavaScript

 

 

Output : 10,c#corner,10.50,true,sanjay