When we start programming, we often store values in a single variable but what if we want to keep a set of same data in a same variable for example set of numbers, set of fruits, set of vegetables (js is somewhat special).

Example:

let fruit1 = "Apple"
let fruit2 = "Banana"
let fruit3 = "Mango"

This works. But imagine storing 50 fruits like this. It becomes messy very fast. Here comes a magical variable called arrays.

An array is a collection of values stored together in order.

---

But But Why We Need Arrays

Think about a list of fruits, instead of writing many variables:

let fruit1 = "Apple"
let fruit2 = "Banana"
let fruit3 = "Mango"

We can store them in one place.

let fruits = ["Apple", "Banana", "Mango"]

Now everything is inside one variable.

---

Creating an Array

Arrays are created using square brackets [].

Example:

let fruits = ["Apple", "Banana", "Mango"]

---

Accessing Elements Using Index

Each value in an array has a position called an index.

Important thing:

Index starts from 0

Example:

let fruits = ["Apple", "Banana", "Mango"]

Index positions:

0 → Apple
1 → Banana
2 → Mango

Access element using index.

console.log(fruits[0])

Output:

Apple

---

Updating Elements

We can change values in an array using the index.

Example:

let fruits = ["Apple", "Banana", "Mango"]
fruits[1] = "Orange"
console.log(fruits)

So we replaced Banana with Orange.

---

Array length Property

Arrays have a property called length.

It tells how many elements are inside the array.

Example:

let fruits = ["Apple", "Banana", "Mango"]

console.log(fruits.length)

Output:

3

---

Looping Through an Array

Many times we want to go through all elements of an array.

A common way is using a for loop.

Example:

let fruits = ["Apple", "Banana", "Mango"]

for(let i = 0; i < fruits.length; i++){
    console.log(fruits[i])
}

Output:

Apple
Banana
Mango

How it works:

Step 1 → start from index 0

Step 2 → check if i < fruits.length

Step 3 → print element

Step 4 → move to next index

The loop continues until all elements are printed.
Thank you for reading and remember in starting i told you js is special so in js's arrays we can keep different type of data types.