Implementing a counter as a class

counter-class.swift

// Impelentation Counter as a class
class Counter {
  private var x: Int
  
  init(number: Int) {
    x = number
  }
  
  func setNumber(_ number: Int) {
    x = number
  }
  
  func getNumber() -> Int {
    return x
  }
  
  func increment() {
    x += 1
  }
  
  func decrement() {
    x -= 1
  }
}

let c = Counter(number: 1)
print(c.getNumber())
c.increment()
print(c.getNumber())
c.decrement()
print(c.getNumber())
c.setNumber(20)
print(c.getNumber())