Scala Queue ++() method with example

Last Updated : 24 Oct, 2019

The ++() method is utilized to return a new queue with all the elements of the queue appended at the back of another queue.

Method Definition: def ++[B >: A](suffix: IterableOnce[B]): Queue[B]

Return Type: It return a new queue with all the elements of the queue appended at the back of another queue.

Example #1:

// Scala program of ++()  
// method  
  
// Import Queue   
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
        // Creating a queue  
        val q1 = Queue(1, 2, 3, 4, 5)  
          
        val q2 = Queue(11, 12, 13, 14, 15)  
          
        // Applying ++() method  
        val result = q1.++(q2) 
              
        // Display output 
        print(result)    
          
    }  
}  

Output:

Queue(1, 2, 3, 4, 5, 11, 12, 13, 14, 15)

Example #2:

// Scala program of ++()  
// method  
  
// Import Queue  
import scala.collection.mutable._
  
// Creating object  
object GfG  
{  
  
    // Main method  
    def main(args:Array[String])  
    {  
        // Creating a queue  
        val q1 = Queue("geeks") 
          
        val q2 = Queue("for", "geeks") 
          
        // Applying ++() method  
        val result = q1 ++ q2
              
        // Display output 
        print(result)  
          
    }  
}  