let! a = 7

while a < 100
	a = a + 1
end

assert 100 == a

let! b = 0
let! c = 0
let! d = 0

while b < 16
	c = 0

	while c < 16
		c = c + 1
		d = d + 1
	end

	b = b + 1
end

assert d == 256

let! e = 0

while true 
	e = e + 1
	if e >= 17
		break
	end
end

assert 17 == e