Memberwise-Initializers.swift

struct Arduino {
	// properties without default value
	var model: String
	var microcontroller: String
	var digitalIOPins: Int
}

let myArduino = Arduino(model: "Yún", microcontroller: "ATmega32U4", digitalIOPins: 20) // memberwise initializer
myArduino.model // prints "Yún"

let otherArduino = Arduino(model: "Uno", microcontroller: "ATmega328P", digitalIOPins: 14) // memberwise initializer
otherArduino.microcontroller // prints "ATmega328P"