Arrays are prevalent in many different contexts. Let me point out two that we will encounter very soon.

Lots of information is arranged in the form of lists. We use array variables to store and organize this information. For example, this could be the list of friends your user has. Or it could be the list of the next 10 weather forecasts. This type of information is delivered in lists from external servers, and we store them in arrays. They can then be sorted, or processed in whatever way we want.

Similarly, a lot of apps have lists as part of their user interface, to represent this information. News feeds, notification lists, tasks, etc. These user interface elements are dynamic. By that I mean that they are not fixed like other user interface elements. The list will have different items that refer to different things, and the number of items in the list can vary. For this reason, these user interface elements are backed by arrays. A common user interface element for showing lists is the ListView. We will be learning about this next week.