I was expecting the following scala code should work without any warnings or errors. But it is not without default case. I all the cases are covered without default case, so I did not understand why should I add it.
def hasMoreThanTwo(input: Seq[Int]): Boolean = input match {
case Seq() => false
case _ +: Seq() => false
case _ +: _ +: Seq() => false
case _ +: tail =>
println(s"size of the given input is ${tail.size + 1} ")
true
// case _ =>
// println("is default case should be true or false? I am not expecting this case")
// false
}sbt test