To create a new function, use the `function` keyword. Provide a name for the function and define any arguments it should accept:

```javascript
function functionName(arguments) {
  // code block
}
```

The structure of a function definition includes:
- The `function` keyword;
- The function name, typically in camelCase like variables;
- Arguments enclosed in parentheses `()`;
- A code block within curly brackets `{}`.

# Arguments
Functions have their own data storage space. **Arguments** are **values** passed to a function, which the function uses as variables. These arguments cease to exist when the function finishes executing.

To define arguments, assign a name to each one:

```javascript
// Function without arguments
function first() {}

// Function with one argument
function second(argument) {}

// Function with multiple arguments
function third(argument1, argument2, argument3) {}
```

If a function accepts multiple arguments, separate them with commas (`,`).


> Note
>
> Arguments are used like variables inside the function's code block.

# Function calling
To use a function, call it using parentheses `()` and provide the necessary arguments if the function expects any:

// Function Definition
function func(arg) {
  console.log("Argument received:", arg);
  console.log("Argument type:", typeof arg);
}

// Function Calling
func(1);
func(2521);
func("Rabbit");
func(true);

Learn the fundamentals of JavaScript, the backbone of dynamic web development. Discover essential concepts like syntax, variables, data types, and operators. Explore how to use conditional statements, loops, and functions to create interactive and efficient programs. Master the building blocks of JavaScript and lay the groundwork for more advanced programming skills.

Discover the fundamentals of JavaScript, including its purpose and syntax. Learn how to work with the console for output and use comments to organize and document your code. These foundational skills will prepare you for a deeper exploration of JavaScript's capabilities.

Explore the building blocks of JavaScript by distinguishing between literals and variables. Understand the core data types, including `null` and arrays, and learn how to manipulate them using array methods.

Learn how to manipulate JavaScript's data types through essential operations. Master assignment, mathematical operations, incrementing and decrementing, comparisons, logical operations, and string concatenation.

Discover how to control the flow of your programs with conditional statements. Master `if`, `else`, and `else if` to instruct JavaScript on making decisions and executing code based on different conditions.

Streamline your code by mastering JavaScript's looping structures. Explore `while`, `do while`, and `for` loops, and learn how to control their behavior using `break` and `continue`. Unlock the power of loops to perform repetitive tasks efficiently.

Discover the power of functions in JavaScript. Learn how to define functions, work with arguments, and use the `return` statement to create reusable and efficient code. Mastering functions will enhance your ability to write clean and modular programs.

Introduction to JavaScript

Definition

Arguments

Function calling