In most languages, enumerations are little more than a data type consisting of a set of named values called elements. In Swift, however, enumerations have been supercharged to give them significantly more power. Enumerations in Swift are a lot closer in functionality to classes and structures; however, they can still be used like enumerations in other languages.

Before we see how enumerations are supercharged in Swift, let's see how we can use them as standard enumerations. The following code defines the Devices enumeration:

enum Devices { 
    case iPod  
    case iPhone  
    case iPad 
} 

In the Devices enumeration, we defined three possible values: iPod, iPhone, and iPad. One of the reasons why enumerations are different in Swift, as compared to other languages, is that they can be prepopulated with values known as raw values. As shown in the following code...