object Demo {

   def main(args: Array[String]) = {

      val colors = Map("red" -> "#FF0000", "azure" -> "#F0FFFF", "peru" -> "#CD853F")

​

      val nums: Map[Int, Int] = Map()

​

      println( "Keys in colors : " + colors.keys )

      println( "Values in colors : " + colors.values )

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

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

   }

}