🚀DAY OF JAVASCRIPT 📘 Introduction to JavaScript Data Types and Functions.

JavaScript is a powerful and flexible programming language used to create interactive websites and web applications. Two of the core concepts every developer must understand are data types and functions. Let’s dive into each of these.

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JavaScript Data Types
In JavaScript, data types represent different kinds of values. They are mainly divided into two categories:

1. Primitive Data Types These are the basic building blocks:

Type	Example	Description
String	"Hello"	Text enclosed in quotes
Number	42, 3.14	Integers and floating-point numbers
Boolean	true, false	Logical values
Null	null	Empty or non-existent value
Undefined	undefined	Variable declared but not assigned
Symbol	Symbol("id")	Unique and immutable value
BigInt	1234567890123456789n	Large integers beyond Number limits

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1. Non-Primitive (Reference) Data Types These can hold multiple values or complex structures:

•Object: { name: "John", age: 30 }

•Array: [1, 2, 3]

•Function: function() { ... }

let name = "Alice"; // String
let age = 25; // Number
let isStudent = true; // Boolean
let score = null; // Null
let address; // Undefined
let user = { name: "Bob", city: "NYC" }; // Object

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🔧 JavaScript Functions
A function is a block of code designed to perform a particular task.

Declaring a Function

function greet(name) {
return "Hello, " + name + "!";
}

console.log(greet("Alice")); // Output: Hello, Alice!

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Function Expressions

const add = function (a, b) {
return a + b;
};

console.log(add(2, 3)); // Output: 5

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Arrow Functions (ES6+)

const multiply = (x, y) => x * y;

console.log(multiply(4, 5)); // Output: 20

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Why Use Functions?
Code reusability

Better organization

Easier to test and debug

📝 Conclusion
Understanding data types and functions is fundamental in JavaScript. Mastering these basics lays the foundation for building dynamic and efficient applications.