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Scala TreeSet +() method with example

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In Scala TreeSet class, the +() method is utilized to add an element to the TreeSet unless it is already present.
Method Definition: def +(elem: A): TreeSet[A] Return Type: It returns a new TreeSet with an additional element unless the element is already present.
Example #1:
// Scala program of +() 
// method 
  
// Import TreeSet
import scala.collection.mutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSets
        val t1 = TreeSet("a", "e", "i", "o"
          
        // Print the TreeSets
        println(t1
          
        // Applying +() method  
        val result = t1 + ("u")
          
        // Display output 
        print("After adding an element: " + result) 
           
    

                    
Output:
TreeSet(a, e, i, o)
After adding an element: TreeSet(a, e, i, o, u)
Example #2:
// Scala program of +() 
// method 
  
// Import TreeSet
import scala.collection.mutable._
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
      
        // Creating TreeSets
        val t1 = TreeSet(2, 1, 5, 4, 1
          
        // Print the TreeSets
        println(t1
          
        // Applying +() method  
        val result = t1 + (3)
          
        // Display output 
        print("After adding an element: " + result) 
           
    

                    
Output:
TreeSet(1, 2, 4, 5)
After adding an element: TreeSet(1, 2, 3, 4, 5)


Last Updated : 03 Nov, 2019
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