Iterating Through a Dictionary in Swift

Question

I am a little confused on the answer that Xcode is giving me to this experiment in the Swift Programming Language Guide:

// Use a for-in to iterate through a         


        

Answer 1

Arrays are ordered collections but dictionaries and sets are unordered collections. Thus you can't predict the order of iteration in a dictionary or a set.

Read this article to know more about Collection Types: Swift Programming Language