How to do it...

We have already defined a Person object as having three separate string properties relating to the person's name; however, these three separate strings don't exist in isolation from each other--they together define a person's name. Currently, to get a person's name, you have to access three separate properties and combine them. Let's tidy this up by defining a person's name as its own struct. Enter the following code into the playground and run the playground:

struct PersonName { 
    let givenName: String 
    let middleName: String 
    var familyName: String 
     
    func fullName() -> String { 
        return "\(givenName) \(middleName) \(familyName)" 
    } 
     
    mutating func change(familyName: String) { 
        self.familyName = familyName 
    } 
} 
var alissasName = PersonName(givenName: "Alissa", middleName: "May", familyName: "Jones")