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// Original Way
class Human {
  var finger: Int
  var toe: Int
  init(finger: Int, toe: Int) {
    self.finger = finger
    self.toe = toe
  }
}
var bob = Human(finger: 10, toe: 10)
bob.finger // 10
bob.toe // 10

but in the general case, we all have 10 finger and toe.
here is a convenient version.

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// Cooler Way
class Human {
  var finger: Int
  var toe: Int
  init(finger: Int, toe: Int) {
    self.finger = finger
    self.toe = toe
  }
  convenience init() {
    self.init(finger: 10, toe: 10)
    // referring to the top init block
  }
}
var bob = Human()
bob.finger // 10
bob.toe // 10