12.1 An Overview of Swift Structures

As with classes, structures form the basis of object-oriented programming and provide a way to encapsulate data and functionality into re-usable instances. Structure declarations resemble classes with the exception that the struct keyword is used in place of the class keyword. The following code, for example, declares a simple structure consisting of a String variable, initializer and method:

struct SampleStruct {

    

    var name: String

    

    init(name: String) {

        self.name = name

    }

    

    func buildHelloMsg() {

        "Hello " + name

    }

}

Consider the above structure declaration in comparison to the equivalent class declaration:

class...