2
val r1 = 1.0 to 10.0 by 0.5
3
val r2 = 1.0 to 1.0 by 1.0
4
val r3 = 10.0 to 1.0 by -0.5
5
val r4 = 1.0 until 1.0 by 1.0
8
def main(args: Array[String]): Unit = {
9
assert(r3 forall (r1 contains _))
10
assert(r1 forall (r3 contains _))
13
assert(List(1,3,5,97,99) forall (r5 contains _))
14
assert(List(2,4,6,98,100) forall (x => !r5.contains(x)))