The fallthrough statement

Similarly, we may occasionally need the fall-through behavior that C switch statements exhibit. We can do this by adding the fallthrough keyword to a case:

switch a 
{ 
case (let x) where x > 0: 
  print("a is positive") 
  fallthrough 
case 0..<10: 
  print("a is single digit") 
default: 
  break 
} 

With judicious use of these additional matching and control transfer features, we can often write extremely neat code. As usual, with power comes responsibility (if only I had a dollar for every blog post that says that), and it's worth reiterating the point that clarity trumps brevity; less is not always more.