Summary  
This chapter explains how to use an array’s built-in length property to obtain the current number of elements and how it updates dynamically as the array changes.

General domain of usage  
Iterating over collections

The `length` property can be used to quickly get the **amount of elements** in an array:

let numbers = [5, 7, 9, 10, 15, 25, 30, 35];
console.log("There are", numbers.length, "numbers in the array.");

A **property** is a variable associated with an object. It represents an **attribute** or characteristic of that object. In this case, the `length` is a property of the array object, and it returns the number of elements in the array. You can access properties the same way you access methods: `objectName.propertyName`.

Definition

What does the `length` property of an array return?

What will be the output of the following code?

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The `length` Property

1. What does the `length` property of an array return?

2. What will be the output of the following code?

The `length` Property

1. What does the length property of an array return?

2. What will be the output of the following code?

1. What does the `length` property of an array return?