Understanding Functions in JavaScript

What is a Function? A function is a block of code designed to perform a specific task. Instead of writing the same code again and again, you can write it once inside a function and reuse it whenever needed. Why Use Functions? Functions are useful because they: Reduce code repetition Make code easier to understand Help in organizing large programs Allow reuse of logic How to Create a Function In JavaScript, you can create a function using the function keyword. Example: function greet() { console.log("Hello, welcome to JavaScript!"); } How to Call a Function To execute (run) a function, you simply call it by its name. greet(); Output: Hello, welcome to JavaScript! Functions with Parameters Functions can take inputs called parameters. Example: function greetUser(name) { console.log("Hello " + name); } greetUser("Athithya"); Output: Hello Athithya Functions with Return Value A function can return a value using the return keyword. Example: function add(a, b) { return a + b; } let result = a