You’ve probably seen these before. If not, well, buckle up. You’re in for a treat.
for i in [1, 2, 3] {
  print(i)
}
      Want to inefficiently calculate some numbers in the fibonacci sequence? Copy the code you see here.
func fib(n) {
	if n <= 1 { return n }
	return fib(n - 2) + fib(n - 1)
}
var i = 0
// Calculate some numbers
while i < 15 {
	print(fib(i))
	i = i + 1
}
      TalkTalk supports protocols, which are like Swift protocols but they do less. But you don’t need to annotate as many types.
Also we’ve got string interpolation.
protocol Greetable {
	func greet(name: String) -> String
}
struct Person: Greetable {
	func greet(name) {
		"Hello, \(name)!"
	}
}
func greet(greetable: Greetable) {
	print(greetable.greet("pat"))
}
greet(Person())