Getting Predicate(Boolean) on List : forall(), exists()

scala> // forall() #359

scala> val data = List(1, 2, 3, 4, 4, 5, 5, 6)
data: List[Int] = List(1, 2, 3, 4, 4, 5, 5, 6)

scala> val res = data.forall(_ <= 7)
res: Boolean = true

scala> val res = data.forall(_ <= 5)
res: Boolean = false

scala>

scala> // exists()

scala> val data = List(1, 2, 3, 4, 4, 5, 5, 6)
data: List[Int] = List(1, 2, 3, 4, 4, 5, 5, 6)

scala> val res = data.exists(_ <= 7)
res: Boolean = true

scala> val res = data.forall(_ >= 7)
res: Boolean = false