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

With the length in hand, you can loop through each element in the list.

const fruits = ["Apple", "Orange", "Banana", "Pineapple"]

for ( let i = 0; i < fruits.length; i++ ) {
  console.log(fruits[i]);
}

Or using forEach.

const fruits = ["Apple", "Orange", "Banana", "Pineapple"]

fruits.forEach(item => {
  console.log(item)
})

Which should return the following.

Apple
Orange
Banana
Pineapple