JAVASCRIPT

Why use functions?

Reusability: Write code once and use it multiple times.
Modularity: Break down complex problems into smaller, manageable pieces.
Readability: Makes your code easier to understand and maintain.
Avoid Repetition: Prevents writing the same code over and over.

Ways to Define Functions in JavaScript

There are several ways to define functions in JavaScript, each with its own nuances:

Function Declarations 
Function Expressions 
Arrow Functions 
Immediately Invoked Function Expressions 

1. Arrow Function
const add = (a, b) => a + b;

2. Anonymous Function

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

🧪 Example: Add Two Numbers

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

Usage:

console.log(add(5, 3)); // Output: 8

⌨️ Form and Input Handling

const form = document.forms[0];

input.value

const name = document.getElementById("username").value;