switch value1 {

case 10:
	print("A")
	fallthrough

case 20:
	print("B")

default:
	print("C")
}

var i = 0

repeat  {

	i += 1
	print("A", i)
} while  i < 10

i = 0
while  i < 10  {

	i += 1
	print("B", i)
}

for i in 0 ..< 10 {

	print("C", i)
}

for i in 1 ... 1 {

	print("D", i)
}