Here is an example of how you create a list of fruit. Check out my article FreeKB - Node.js - Getting Started with Lists for more details on Lists / Arrays.

length can be used to count the number of elements in the list.

const fruits = ["Apple", "Orange", "Banana", "Pineapple"];
console.log(`There are ${fruits.length} elements in the 'fruits' list`);

Which in this example should return 4.

~]$ node app.js
There are 4 elements in the 'fruits' list