switch.swift

// 1.
enum Animal {
  case cat
  case dog
  case foo
  case bar
}

let count = 10
let animal = Animal.cat
switch animal {
 case .cat:
  print("I am kitty cat")
 case .cat where count < 5:
  print("I am kitty cat with count less than 5")
 default: break
}

// 2.
for i in 0..<count where animal == .cat {
 print(animal, i) 
}