A single case in a switch statement can match a range of values.
let number = 20
switch number {
case 0:
print("Zero")
case 1..<10:
print("Between One and Ten")
case 10..<20:
print("Between Ten and Twenty")
case 20..<30:
print("Between Twenty and Thirty")
default:
print("Greater than Thirty or less than Zero")
}