To find out how many items there are in an array, use count. Type and run the following code:

// count returns the number of items in an array
shoppingList.count

2 is displayed in the Results area.

You can check whether an array is empty by using isEmpty. Type and run the following code:

// isEmpty returns true if an array is empty
shoppingList.isEmpty

false is displayed in the Results area.

Now, let's see how to add items to arrays.