One of an array’s built-in properties is length and it returns the number of items in the array. We access the .length property just like we do with strings. Check the example below:

const newYearsResolutions = ['Keep a journal', 'Take a falconry class'];

console.log(newYearsResolutions.length);
// Output: 2

In the example above, we log newYearsResolutions.length to the console using the following steps:

• We use dot notation, chaining a period with the property name to the array, to access the length property of the newYearsResolutions array.
• Then we log the length of newYearsResolution to the console.
• Since newYearsResolution has two elements, 2 would be logged to the console.

When we want to know how many elements are in an array, we can access the .length property.