Primitives Data Types - Practicise

Introduction to JavaScript

0/6

What is JavaScript?

Key Features of JavaScript

A Brief History of JavaScript

JavaScript in the Browser vs. Server (Node.js)

Setting Up JavaScript Environment

Why Learn JavaScript?

How to Add JavaScript?

0/3

Inline JavaScript

Internal JavaScript

External JavaScript

Different Ways to Output Data

0/4

Using innerHTML

Using document.write()

Using window.alert()

Using console.log()

Variables and Constants

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var, let, const

Scope of Variables

Data Types

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Primitives Data Types

Non – Primitives Data Types

Operators

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Arithmatic Operator

Assignment Operators

Comparison Operators

Logical Operators

Bitwise Operators

Type Coercion and Conversion

Conditional Statements (if, else if, else)

0/2

if, else if, else

Ternary Operator

Switch Statement

0/1

What is Switch Statement?

Loops

0/5

for…of and for…in Loops

Loop Control: break, continue

Functions

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What is Function ?

Function Declaration vs Function Expression

Parameters and Return Values

Default Parameters

Rest and Spread Syntax (…args)

Anonymous Functions

Arrow Functions

Higher-order Functions

Objects

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Creating objects

Accessing and Modifying Properties

Methods in objects

this Keyword and its Behavior

Object Destructuring

Arrays

0/5

Array Declaration and Initialization

Accessing and Modifying Array Elements

Spread Syntax with Arrays

Array Destructuring

DOM Manipulation

0/4

What is DOM Manipulation?

Selecting Elements

Changing Content and Styles

Adding and Removing Elements Dynamically

Events and Event Listeners

0/7

What is Events and Event Listeners?

Common Event Types and Practical Examples

Removing Event Listeners

Passing Parameters to Event Handlers

Event Delegation

Stopping Event Propagation

Classes in JavaScript

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Classes in JavaScript

Defining a Class

Objects in JavaScript

Real-World Example: User Class

Adding Getters and Setters

Inheritance in JavaScript

The this Keyword

String Functions in JavaScript

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String Functions in JavaScript

Number Functions in Javascript

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Number Functions in JavaScript

Error Handling in JavaScript

0/5

Error Handling in JavaScript

try…catch Block

Throwing Custom Errors

Combining try…catch with Custom Errors

JavaScript

About Lesson

Primitives Data Types

Primitive types are basic data types that hold a single value.

1. String:

Used to represent text, enclosed within quotes (”, “”, or backticks “ `).

JavaScript

let name = "Manjeet Singh";

2. Number:

Used for both integers and floating-point numbers.

JavaScript

let age = 25;
let price = 9.99;

3. Boolean:

Represents true or false values.

JavaScript

let isVerified = true;

4. Null:

Represents an intentional absence of any value.

JavaScript

let result = null;  // Explicitly empty

5. Undefined:

Represents a variable that has been declared but not yet assigned a value.

JavaScript

let x;
console.log(x);  // Output: undefined

6. Symbol:

Introduced in ES6, Symbol is used to create unique values.

JavaScript

let sym = Symbol('unique');