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Scala immutable TreeSet foreach() method

  • Last Updated : 19 Apr, 2020
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In Scala immutable 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.immutable._
  
// 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.immutable._
  
// 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



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