We all know about Arrays, Dictionaries, and Lists in all programming languages to store a list of data. Similarly, in PowerApps, there is a Collections object to store the list of data. You can store any kind of data in Collections and it can be used as single or multidimensional arrays.

Even you can have collections of collections. You can store data from your data source in Collections and use that in your app screens. Collections is useful when you want to make your app work in offline mode. Let's check out how to work with Collections and some of the functions to process Collections in PowerApps.