Scala immutable TreeSet mkString() method with a separator

In Scala immutable TreeSet class the mkString() method is utilised to display all the elements of the TreeSet in a string along with a separator.

Method Definition: def mkString(sep: String): String

Return Type: It returns all the elements of the TreeSet in a string along with a separator.

Example #1:

// Scala program of mkString()
// method

// Import TreeSet
import scala.collection.immutable._

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Creating TreeSet
        val t1 = TreeSet(3, 1, 5, 2, 4)

        // Print the TreeSet
        println(t1)

        // Applying mkString method
        val result = t1.mkString(", ")

        // Displays output
        print("TreeSet: " + result)

    }
}

Output:

TreeSet(1, 2, 3, 4, 5)
TreeSet: 1, 2, 3, 4, 5

Example #2:

// Scala program of mkString()
// method

// Import TreeSet
import scala.collection.immutable._

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Creating TreeSet
        val t1 = TreeSet("u", "a", "i", "o", "e")

        // Print the TreeSet
        println(t1)

        // Applying mkString method
        val result = t1.mkString(", ")

        // Displays output
        print("TreeSet: " + result)

    }
}

Output:

TreeSet(a, e, i, o, u)
TreeSet: a, e, i, o, u