Summary  
This chapter covers how to define arrays to store multiple values (including objects), how indexes work, and how to access elements and their properties.  

General domain of usage  
Data management

Arrays are used to store multiple values in a single variable.

```javascript
const numbers = [1, 2, 3];
```

Each value in an array has a position called an index. Indexes start from 0.



const numbers = [1, 2, 3];

console.log(numbers[0])



Arrays often store collections of similar data, but they can also store objects.

```javascript
const users = [
  { name: "John", age: 25 },
  { name: "Jess", age: 30 }
];
```

You can access elements by index and work with their data:



const users = [
  { name: "John", age: 25 },
  { name: "Jess", age: 30 }
];

console.log(users[0].age);

Learn the core concepts of JavaScript needed for backend development, including variables, data structures, functions, and asynchronous code. Practice working with real data and understand how JavaScript behaves outside the browser. Build a strong foundation before moving on to Node.js and server-side development.

Working with Arrays