JavaScript & Frameworks Syllabus

Data Types

Definition: Data types specify the type of data that a variable can hold. JavaScript is a dynamically-typed language, which means you don't have to declare a variable’s type.

Explanation: JavaScript provides several types of data types: Primitive and Non-Primitive types.

Primitive Data Types:

• Number: Represents both integer and floating-point numbers
• String: Represents sequences of characters
• Boolean: Represents true or false
• undefined: Represents a variable that has not been assigned a value
• null: Represents an intentional absence of any value
• Symbol: Represents a unique and immutable value

Non-Primitive Data Types: These include objects and arrays.

Variables

Definition: Variables are containers for storing data values. JavaScript uses the var, let, and const keywords to declare variables.

Explanation: Variables can be declared using var (function-scoped), let (block-scoped), or const (block-scoped and immutable).

Loops

Definition: Loops are used to execute a block of code repeatedly based on a condition.

Explanation: JavaScript supports several types of loops: for, while, and do-while.

Conditions

Definition: Conditions control the flow of the program based on certain criteria.

Explanation: JavaScript supports conditional statements like if, if-else, and switch to make decisions in the code.

Functions

Definition: Functions are reusable blocks of code that perform a specific task.

Explanation: Functions can be defined using function declarations or function expressions.

Object-Oriented Programming (OOP)

Definition: OOP is a programming paradigm based on the concept of objects that contain both data and methods.

Core Concepts:

• Encapsulation: Bundling of data and methods. Example: class Person { constructor(name) { this.name = name; } }
• Inheritance: Mechanism to create a new class from an existing class. Example: class Student extends Person { }
• Polymorphism: Ability to use a method in different ways. Example: method overriding.
• Abstraction: Hiding complex implementation details. Example: abstract classes.

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