Understanding Functions in JavaScript For Beginners

Functions make your code more organized

Photo by Lautaro Andreani on Unsplash

Functions are a fundamental concept in JavaScript. They allow you to encapsulate a block of code that can be executed whenever needed. They make your code more organized, modular, and reusable.

FUNCTIONS

In JavaScript, you can declare a function using the function keyword. Here's a simple example:

function greet(name) {
  console.log(`Hello, ${name}!`);
}

We’ve defined a function called greet that takes a single parameter, name. The function logs a greeting message to the console, including the provided name.

Once you’ve declared a function, you can call it by using its name followed by parentheses. You can pass arguments inside the parentheses if the function expects any. Let’s call our greet function:

greet("Alice"); // Output: Hello, Alice!
greet("Bob");   // Output: Hello, Bob!

Functions can also return values using the return statement. Here's an example:

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

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

In this case, the add function takes two arguments and returns their sum. We store the result in the…