JavaScript Tutorial for beginners

Updated:03/feb/2022 by Computer Hope

The first ever JavaScript was created by Brendan Eich at Netscape, and has since been updated to conform to ECMA-262 Edition 5 and later versions. This engine, code named SpiderMonkey, is implemented in C/C++ .
A versatile programming language frequently used for web development is JavaScript. It enables you to add dynamic elements and interaction to webpages.

Below is an example of a basic HTML web page written in HTML with a description of each section and its function.

Using the script tag, you can add JavaScript straight to an HTML document. For instance: JavaScript declares variables using the var, let, or const keywords.
JavaScript declares variables using the var, let, or const keywords. For instance:

var myAge = 25; // Mutable variable
let name = 'John'; // Mutable variable
const pi = 3.14; // Immutable constant

Data Types: JavaScript has several built-in data types, including:
Primitive types: number, string, boolean, null, undefined, and symbol.
Complex types: object and array.
Functions are reusable blocks of code. we can define in javascript functions using the function keyword.


                        
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "https://www.w3.org/TR/html4/loose.dtd">

 
<html>
<head>

 
<title>Javascript Example page</title>

 
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">

 
<script>  alert("hello world")  </script>  </head>
<body>

 
<h1>This is a heading</h1>

 
<p>This is an <b>example</b> of a basic HTML page.</p>

 
</body>
</html>

Features of JavaScript

Platform Independent
The Syntax is Similar to C
Prototype-Based Object Model
DOM Manipulation
Javascript as a Client-Side Language
Form Validation
Detecting the User’s Browser and OS
Ability to Create Functions in the Script

Mandatory Tools you will need to install

you will need a Pentium 200-MHz computer with a minimum of 128 MB of RAM
Linux 7.1 or Windows 95/98/2000/XP operating system.
chrome browser
Microsoft Notepad or any other text editor

Conclusion