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Hey everyone, I'm Chris. And welcome to the fourth section of this course, more collections. Now you learned about some basic collections in the second part of this course, and those were tuples and arrays. And while those collections are really useful, sometimes you need some more powerful ways to store and work with collections of data. And that leads you to the next two collection types in this course, dictionaries and sets. You'll start by learning how dictionaries work, what a key value pair is. You'll see some of the neat features of dictionaries and how to iterate over dictionaries with, yep you guessed it, a loop, those loops are pretty handy, aren't they? And then you learn about another powerful collection in Swift and that's sets. Now sets are a little like arrays and a little like dictionaries, but sets are most useful when you're comparing two or more sets for the similarities and differences. And as always, I'll have a few challenges for you too along the way to help you check your knowledge, but also give you a chance to show off what you know. So let's get started head straight in the next video, and I'll see you there.
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