class Person {

  var age: Int

​

  // 1. initializer with no arguments

  init() {

    age = 20

  }

​

  // 2. initializer with an argument

  init(age: Int) {

    self.age = age

  }

​

  // method to return age

  func getAge() -> Int {

    return age

  }

}

​

var person1 = Person()

var person2 = Person(age: 23)

​

print("Person1 Age:", person1.getAge())

print("Person1 Age:", person2.getAge())