Arrays are versatile for storing and retrieving data. Retrieving data using square brackets `[]` is called **indexing**.

```javascript
let arr = [1, 2, 3, 4, 5, 6];
arr[3] // This is indexing
```

However, there are various methods available for working with arrays.

# Adding Elements
There are different ways to add elements to an array.

### Push
The `push()` method adds a new value to the end of the array:

let arr = [1, 2, 3];

arr.push(4);
arr.push(5);
arr.push(6);

console.log(arr);

### Unshift
The `unshift()` method works like the `push()` method, but it inserts the value at the beginning of the array.

let arr = [1, 2, 3];
console.log("Array:", arr);

arr.unshift(222);  // Insert element at the start

console.log("Array:", arr);

### Indexing
You can append a new value by **indexing**:

let arr = [1, 2];

arr[2] = 3;
arr[3] = 4;

console.log(arr);

Indexing allows you to assign a value to a specified index, reassign a previous value, and more:

let arr = [1, 2, 3];

arr[0] = 4;

console.log("Array:", arr);

To create a new element in the array without mistakes, you can use the `push(value)` method or the `arr[arr.length] = value` expression:

let myArray = [];

myArray[myArray.length] = "indexing";
console.log("After first indexing:", myArray);

myArray.push("pushing");
console.log("After first pushing:", myArray);

myArray[myArray.length] = "indexing";
console.log("After second indexing:", myArray);

myArray.push("pushing");
console.log("After second pushing:", myArray);

# Deleting Elements
Sometimes, you may need to delete elements from an array. This can be done in different ways.
### Pop
The `pop()` method deletes the last element in an array and allows you to save it to another variable:

let arr = [11, 22, 33, 44];
console.log("Array:", arr);

let x = arr.pop();  // Remove and save the last element in arr to variable x

console.log("Popped element:", x);
console.log("Array now:", arr);

### Shift
The `shift()` method works like `pop()`, but it removes the **first element** from an array:

let arr = [11, 22, 33, 44, 55, 66];
console.log("Array:", arr);

let popped = arr.pop();  // Remove the last element

console.log("Popped:", popped);
console.log("Array:", arr);

let shifted = arr.shift();  // Remove the first element

console.log("Shifted:", shifted);
console.log("Array:", arr);

How can we add an element to the end of the array?

How can we remove the last element in the array?

Our first section will introduce you to JavaScript and explore its syntax. This initial step will give you a fundamental understanding of JavaScript's syntax, setting the stage for more in-depth learning in subsequent sections.

We'll dive into the essential data types that JavaScript operates with. We'll begin by distinguishing between literals and variables and then explore the diverse range of data types used in JavaScript. This knowledge will form a solid foundation for your journey into JavaScript.

We're acquainted with the various data types. It's time to roll up our sleeves and learn how to manipulate them. In this third section, we'll explore the operations that can be performed with each data type, equipping you with practical skills to work effectively with JavaScript's data structures.

Delve into the art of controlling the flow of execution in JavaScript. It's a powerful skill that enables us to instruct the interpreter precisely on how to behave under various conditions. You'll gain the ability to orchestrate your code's behavior.

Uncover the code optimization through the use of loops. Loops allow us to streamline our code by performing repetitive actions efficiently. We'll delve into JavaScript's different types of loops and discover how to wield their power effectively. 

Unlock the potential of functions as essential tools for crafting simple yet powerful programs. You'll master creating and utilizing functions, empowering you to simplify your coding endeavors and enhance your problem-solving skills.

Introduction to JavaScript

Array Methods

Adding Elements

Push

Unshift

Indexing

Deleting Elements

Pop

Shift

How can we add an element to the end of the array?

Select a few correct answers

How can we remove the last element in the array?