JavaScript Basics, Operators and Conditional Statements for Salesforce

This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters

	JavaScript Basics -
	javaScript can be used for -
	Front End Applications -
	Angular JS ...
	Back End Applications -
	Node JS
	javaScript works for both Mobile and Web Apps
	ES6 (2015) onwards new version introduced for every year. (ES6 Major update to JavaScript)
	To include in the html or visualforce -
	<script src="script.js"></script>
	Shortcut to open the javaScript console -
	Option + Command + j in Mac
	Ctrl + Alt + J in Windows
	console.log('print here'); // to print in the javaScript console
	JavaScript Data Types -
	1. Number
	2. String
	3. Boolean
	4. Undefined
	5. Null
	6. Symbol
	7. Bigint
	Operators -
	const num = 2;
	console.log(num + 2, num - 2, num / 2, num ** 3);
	const firstName = 'Srinu', lastName = 'SFDC';
	console.log(firstName + ' ' + lastName);
	// Templace Strings
	console.log(`${firstName} ${lastName}`);
	== and ===
	falsy values: 0, '', undefined, null, NAN
	console.log(Boolean(0));
	// Assignment Operator -
	let num = 5;
	// Arthematic Operators
	// Unary Operator
	num++;
	console.log('num: '+num);
	// Binary Operator
	console.log(num + 5 - (8 - 7), num - 5, num * 5, num / 5, num ** 3);
	// Ternary Operator
	// Stmt
	num > 0 ? console.log('num is > 0') : console.log('num is < 0');
	// expression
	num = 'num is ' + (num > 0 ? '> 0' : '< 0');
	console.log('num: '+num);
	Type Conversion and Coercion -
	// type coversion
	console.log(Number('20')+5);
	console.log(Number('test')); //NAN
	console.log(String(10));
	// automatic type coercion
	console.log('I am having ' + 15 + ' certifications ' ); // number will be converted to text , + operator to alway number
	console.log('20'-'10');
	console.log('20'/'10');
	console.log('20'>'10');
	conditional statement -
	if() {}
	else {}
	----------------
	Only equality -
	===============
	let day = 'Wedensday';
	switch(day) {
	case 'Sunday':
	console.log(`This is Sunday`);
	case 'Monday':
	console.log(`This is Monday`);
	case 'Tuesday':
	console.log(`This is Tuesday`);
	break;
	case 'Wednesday':
	case 'Thrusday':
	console.log(`This is Wednesday or Thrusday`);
	break;
	case 'Friday':
	console.log(`This is Friday`);
	break;
	case 'Saturday':
	console.log(`This is Saturday`);
	break;
	default:
	console.log(`Invalid Day`);
	}