swift sample

class Square: NamedShape {
    var sideLength: Double
   
    init(sideLength: Double, name: String) {
        self.sideLength = sideLength
        super.init(name: name)
        numberOfSides = 4
    }
   
    func area() ->  Double {
        return sideLength * sideLength
    }
   
    override func simpleDescription() -> String {
        return "A square with sides of length \(sideLength)."
    }
}
let test = Square(sideLength: 5.2, name: "my test square")
test.area()
test.simpleDescription()
 
Excerpt From: Apple Inc. “The Swift Programming Language.” iBooks. https://itun.es/fi/jEUH0.l