There are three primary collection types that are available in swift for storing a collection of values. They are dictionaries, sets, and arrays
Arrays: Arrays is an ordered collection of values, which is stored in the same type of values in an ordered list.
Sets: Sets are an unordered collection of unique values, which are stored in a distinct value of the same type in a collection without any defined ordering.
Dictionaries: Dictionaries are an unordered collection of Key and value pair associations in an unordered manner.