## Why Use Functions?
Repeating code makes programs long and hard to maintain. Functions let you group commands into a reusable block, reducing repetition and making your code cleaner.

## How to call Functions?
To **call** a function, simply use its name followed by parentheses, placing any required arguments inside those parentheses. 

In the example below, the `greet` function is called on line 5 by adding parentheses to its name and passing **"Alice"** as the name argument.

### A Simple Function Example


function greet(name) {
    console.log("Hello, " + name + "!");
}

greet("Alice");

Here’s what happens when you call `greet("Alice")`:

1. JavaScript looks for the function named `greet`.
2. It passes the string **"Alice"** as the argument for the parameter `name`.
3. Inside the function, the console.log statement concatenates "Hello, ", the value "Alice", and "!" to create the full greeting.
4. The final message **"Hello, Alice!"** is then printed to the console.


Welcome to the JavaScript Ninja Course! This engaging and interactive course is designed to introduce you to the fundamentals of JavaScript programming through a fun and educational game. You'll guide a ninja through various challenges, using JavaScript to control movements and interact with objects like sushi. Starting with the basics, you'll learn how to navigate the map, pick up and place sushi, and gradually progress to more complex programming concepts such as functions, loops, and conditional statements. Each chapter offers hands-on practice to reinforce your learning, culminating in exciting challenges that test your skills. Whether you're a complete beginner or looking to sharpen your coding abilities, this course provides a comprehensive and enjoyable learning experience. Join us and become a coding ninja!

In the "Basic Controls" section, you'll be introduced to the foundational features of JavaScript through the engaging Ninja Game. You'll learn how to use JavaScript commands to control your ninja's movements and interactions on the grid, mastering essential functions like moving, picking up, and placing sushi. Through hands-on practice, you'll apply these skills to solve fun challenges, reinforcing your understanding of JavaScript's basic capabilities.

In the "Functions" section, you'll delve into the powerful JavaScript feature of creating and utilizing functions to streamline your code. You'll learn how to write functions to perform specific tasks, enhancing code reusability and clarity. By practicing decomposition, you'll break down complex problems into simpler functions, mastering the art of organized and efficient coding.

In the "Loops" section, you'll explore the essential JavaScript feature of loops, which allows you to execute repetitive tasks efficiently. You'll learn to implement both for loops and while loops, gaining the ability to automate actions and iterate over sequences. By mastering nested loops, you'll tackle more complex scenarios, enhancing your ability to write concise and powerful code.

In the "If-Else Statements" section, you'll learn how to use JavaScript's conditional logic to make decisions within your code. You'll explore how if-else statements allow your ninja to respond dynamically to different scenarios, enabling more intelligent and adaptable behavior. Through practical exercises, you'll apply these concepts to solve challenges, enhancing your ability to write responsive and decision-driven code.

In the "Challenges" section, you'll apply your JavaScript skills to tackle a series of engaging and complex problems. These challenges will test your understanding of loops, functions, and conditional logic as you guide your ninja to align columns, build letters, and traverse intricate patterns. By solving these puzzles, you'll refine your coding abilities and gain confidence in applying JavaScript to creative and real-world scenarios.

Using Functions

Why Use Functions?

How to call Functions?

A Simple Function Example

Løsning

Using Functions

Why Use Functions?

How to call Functions?

A Simple Function Example

Løsning