Scala TreeSet foreach() method with example

In Scala TreeSet class, the foreach() method is utilized to apply a given function to all the elements of the TreeSet.

Method Definition: def foreach[U](f: (A) => U): Unit

Return Type: It returns all the elements of the TreeSet after applying the given function to each of them.

Example #1:

// Scala program of foreach()
// method

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

// Creating object
object GfG
{

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

        // Creating TreeSet
        val t1 = TreeSet(2, 4, 6, 7, 8, 9)

        // Print the TreeSet
        println(t1)

        // Applying foreach method to print the TreeSet
        print("Elements in the TreeSet: ")
        t1.foreach(x => print(x + " "))

    }
}

Output:

TreeSet(2, 4, 6, 7, 8, 9)
Elements in the TreeSet: 2 4 6 7 8 9

Example #2:

// Scala program of foreach()
// method

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

// Creating object
object GfG
{

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

        // Creating TreeSet
        val t1 = TreeSet(2, 4, 6, 7, 8, 9)

        // Print the TreeSet
        println(t1)

        // Applying foreach method
        t1.foreach(x => println(x + " times " + x +" = " + x*x))

    }
}

Output:

TreeSet(2, 4, 6, 7, 8, 9)
2 times 2 = 4
4 times 4 = 16
6 times 6 = 36
7 times 7 = 49
8 times 8 = 64
9 times 9 = 81