agoiabel

Abel: Youtuber = Youtuber(channelName:"Swift",subscribers:32,name:"Abel",age:27)

Abel.celebrateBirthday() //Happy birthday Abel

Abel.age //27

agoiabel

class Youtuber: Person {
  
  let channelName: String
  var subscribers: Int
  
  //we need to pass in the name & age of the Youtuber Person
  init(channelName: String, subscribers: Int, name: String, age: Int) {
    self.channelName = channelName
    self.subscribers = subscribers
    

agoiabel

class Person {
  var name: String
  var gender: String = "Male"
  
  init(name: String) {
    self.name = name
  }
}

class Foreigner: Person {

agoiabel

Person {
  var firstname: String
  var middlename: String? //we created the optional with the ?
  var lastname: String
  
  func fullName() -> () {
     print("Your fullname is \(firstname) \(middlename!) \(lastname)")
  }
}

agoiabel

Person {
  var firstname: String
  var middlename: String?
  var lastname: String
  
  func fullName() -> () {
     print("Your fullname is \(firstname) \(middlename!) \(lastname)")
  }
}

agoiabel

Person {
  var firstname: String, var middlename: String?, var lastname: String
  
  func fullName() -> () {
     if (middlename != nil) {
        print("Your fullname is \(firstname) \(middlename!) \(lastname)")  
     } else {
        print("Your fullname is \(firstname) \(lastname)")
     }
     

agoiabel

Person {
  var firstname: String, var middlename: String?, var lastname: String
  
  func fullName() -> () {
    
     if let middlename: String = middlename {
         print("Your fullname is \(firstname) \(middlename) \(lastname)")
     } else {
         print("Your fullname is \(firstname) \(lastname)")
     }

agoiabel

Person {
  var firstname: String, var middlename: String?, var lastname: String
  
  func fullName() -> () {
    
     guard let middlename = middlename else {
       print("Your fullname is \(firstname) \(lastname)")  
       return
     }
    

agoiabel

func dayType(for day: String) -> String {
  switch day {
    case: "Saturday", "Sunday": return "Weekend"
    case: "Monday", "Tuesday", "Wednessday", "Thursday", "Friday": return "Weekday"
    default: return "This is not a valid date"
  }
}

let result1 = dayType(for: "Sunday") //will return "Weekend"

agoiabel

enum Day {
  case Sunday
  case Monday
  case Tuesday
  case Wednessday
  case Thursday
  case Friday
  case Saturday
}