# JavaScript Arrays 101

In this article, we get to know about the array in js , basics about the array , how to access the elements in the array and a lot more.

## **What is Array?**

The `Array` object, as with arrays in other programming languages, enables storing a collection of multiple items under a single variable name.

*   **JavaScript arrays are resizable** and **can contain a mix of different data types.**
    
*   **JavaScript array-copy operations create shallow copies**. (All standard built-in copy operations with *any* JavaScript objects create shallow copies, rather than deep copies).
    

### How to Create an Array

Creating an array is simple. We use square brackets `[]` and separate our items with commas.

JavaScript

```javascript
// Creating an array of favorite fruits
let fruits = ["Apple", "Banana", "Cherry", "Mango"];
```

By using one variable (`fruits`), we’ve successfully grouped four pieces of information together.

### Accessing array elements

Each element in an array has a **position called an index**. Array indexing starts from 0.

```javascript
let fruits = ["Apple", "Banana", "Cherry"];

console.log(fruits[0]); // Apple
console.log(fruits[1]); // Banana
console.log(fruits[2]); // Cherry
```

### Changing Array Values

You can modify any element using its **index**.

```javascript
let fruits = ["Apple", "Banana", "Cherry"];

fruits[1] = "Mango";

console.log(fruits);
// ["Apple", "Mango", "Cherry"]
```

### Finding Array Length

To find the total number of elements in an array, we use the **length property**.

```plaintext
let fruits = ["Apple", "Banana", "Cherry"];

console.log(fruits.length); // 3
```

### Looping Over Arrays

The real power of arrays comes when you combine them with loops. Instead of writing `console.log` five times, you can use a `for` loop to go through the entire collection automatically.

```javascript
let colors = ["Red", "Green", "Blue", "Yellow"];

for (let i = 0; i < colors.length; i++) {
    console.log("Color " + i + " is " + colors[i]);
}
```

### Conclusion

At the end, with this article we can learn about the basics of array and can learn about how to acces the element from the array , about indexing and how to loop over the arrays.