object Demo {

   def main(args: Array[String]) = {

      val fruit = Set("apples", "oranges", "pears")

      val nums: Set[Int] = Set()

​

      println( "Head of fruit : " + fruit.head )

      println( "Tail of fruit : " + fruit.tail )

      println( "Check if fruit is empty : " + fruit.isEmpty )

      println( "Check if nums is empty : " + nums.isEmpty )

   }

}