#swift4

Swift 4 – Learn to Code with Apple’s New Language

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3…

Here’s an example of swift class for a rectangle that has an initializer and optional default values. 

import Foundation

class Rectangle: Codable {

    var name:String

    var length:Int

    var width:Int

    init(name:String = "", length:Int  = 4, width:Int = 2) {

        self.name = name

        self.length = length

        self.width = width

    }

}

This rectangle will have an area of 8 by default: 

r = Rectangle()

print(r.length * r.width) // => 8

but if we define the width to be 4, we will have a square with an area of 16

s = Rectangle(width: 4)

print(s.length * s.width) // => 16

YouTube Tutorial: Code With Chris

How to Make an App for Beginners (Xcode 9, Swift 4)