Swift
self.length = length self.breadth = breadth area = length * breadth }
init(fromLeng leng: Double, fromBread bread: Double) { self.length = leng self.breadth = bread area = leng * bread } }
let ar = Rectangle(fromLength: 6, fromBreadth: 12) println("area is: \(ar.area)")
let are = Rectangle(fromLeng: 36, fromBread: 12) println("area is: \(are.area)") When we run the above program using playground, we get the following result: area is: 72.0 area is: 432.0
Local & External Parameters Initialization parameters have both local and global parameter names similar to that of function and method parameters. Local parameter declaration is used to access within the initialize body and external parameter declaration is used to call the initializer. Swift initializers differ from function and method initializer that they do not identify which initializer are used to call which functions. To overcome this, Swift introduces an automatic external name for each and every parameter in init(). This automatic external name is as equivalent as local name written before every initialization parameter. struct Days { let sunday, monday, tuesday: Int init(sunday: Int, monday: Int, tuesday: Int) { self.sunday = sunday self.monday = monday 137