Introduction To JavaScript:
===========================

HTML:
	HYPER TEXT MARKUP LANGUAGE
	TAG BASED
	CASE INSENSITIVE LANGUAGE
	make display any content as web content
CSS:
	CASCADING STYLE SHEETS
	TO APPLY THE STYLES TO THE WEB ELEMENTS OF HTML
		INTERNAL OR EXTERNAL
	PROPERTY BASED
	to define/apply styles to the web content

MAIL: INCORRECT
PASSWORD: CORRECT
LOGIN
==> LOGIN FAILURE

FRONT END <==================> BACK END (WEB LOGIC LAYER + DATABASE LAYER)

About JavaScript:
=================
1) JavaScript is one of the server based language.
2) JavaScript is one of the client based language.
client ==> a device
	user ===> request ==> server
	response
which can be used to define the functionality to web content/web page.
Functionality:
==============
	providing the input
	processing the input
	giving of the result

Ex: Whatsapp


calculator
	+
	ip1 = 10 
	ip2 = 20
	result = ip1 + ip2

DIFFERENCE BETWEEN JAVA AND JAVASCRIPT:
========================================
JAVA ==> SERVER SIDE
JS ==> CLIENT AND SERVER BASED

USING THE JAVASCRIPT:
	AT CLIENT SIDE:
		1) WE CAN HIDE THE DATA/OPTIONS
		2) WE CAN MAKE DISPLAY DATA/OPTIONS
		3) WHILE SEARCHING IN THE BROWSER WE CAN ABLE TO MAKE DISPLAY SIMILAR OPTIONS

TRANSLATORS:
============

JAVA/JAVASCRIPT/PYTHON ==> HIGH LEVEL PROGRAMMING LANGUAGES
	KEYWORDS

SORCE CODE ==> NOT UNDERSTANDABLE BY THE DEVICES

SOURCE CODE ==> TRANSLATOR ====> MACHINE LEVEL CODE (OBJECT CODE)

THREE TYPES:
	1) COMPILER
	2) INTERPRETER
	3) ASSEMBLER

JAVASCRIPT CAN USE WITHIN THE HTML 
	<script> </script>
JAVASCRIPT CAN ALSO WORK ON THE DEVICES WHERE THE JAVASCRIPT INTERPRETER IS AVALIABLE.
	node js

COMPILER:
========
SOURCE CODE{
	LINE-1
	LINE-2
	LINE-3
	BLOCK-1{
		LINE-4
		LINE-5
	}
}

AT COMPILER:
	BLOCK1
	{
		10 LINES
	}
	REMAINING BLOCK
	{
		30 LINES
	}

Interpreter?
============

==> JAVASCRIPT IS INTERPRETER DEPENDENT LANGUAGE.

PROGRAMMING LANGUAGES:
	HIGH LEVEL
	MIDDLE LEVEL/ASSMEBLY
	LOW LEVEL (OLDER) ==> IN 1'S AND 0'S
		NOT EASY AND NOT PORTABLE
	WINDOWS32|WINDOWS64|WINDOWS128
	LINUX
	MACOS

EX: 10 ==> 1010
0000 1010
0000 0000 0000 1010

===================================
CASE SENSITIVE LANGUAGE.
JAVASCRIPT CAN ACCESS THE HTML AND CSS ALSO.

EX: WEBPAGE
	HEADING
	SUB-HEADING1
	PARA
		LINK
		IMAGE
	c = 30
	SUB-HEADING2
		IMAGE
		TABLE

var a = 10
var b = 20
var c = 30
console.log(c)

=========================================
DYNAMICALLY TYPED PROGRAMMING LANGUAGE:
=======================================

HIGH LEVEL PROGRAMING LANGUAGES:
	THREE TYPES:
		STATICALLY TYPED
		DYNAMICALLY TYPED
		STRONGLY TYPED

Syntax for data definition:
	datatype variable-name = value;
	ex: int a = 100;

In C:
	int a = 0.00012;
In Java:
	int a = 0.00012f; ==> Incompatible type of error

JavaScript/python:
	Dynamically typed
	==> need not the type of the data in before to the variable name.
	==> during the running of the program, the machine can detect the type of the data automatically based on the assignment.
	ex: var a = 10;
	var b = 12.23;
	var c = "string";

History of JavaScript:
======================
ECMAScript (ES) ==> the standard document/technical specification
JavaScript (JS) ==> practical implementation
Author: Brenden Eich
	Netscape Corporation, 1997

Versions:
	JavaScript-1/EcmaScript-1 ==> 1997
	JavaScript-2 ==> 1998
	JavaScript-3 ==> 1999
	JavaScript-4 ==> Abonded
	JavaScript-5 ==> 2009
	JavaScript-5.1 ==> 2011
	JavaScript-2015 ==> 2015
Current version: JavaScript-2024 (July)