Scala Queue ++=() method with example Last Updated : 18 Oct, 2019 Improve Improve Like Article Like Save Share Report The ++=() method is utilized to add element of a queue at the back of another queue. Method Definition: def ++=(xs: IterableOnce[A]): Queue.this.type Return Type: It returns the given queue with elements of another queue added at its end. 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(3, 4, 5) val q2 = Queue(1, 2) // Applying ++=() method q2.++=(q1) // Display output print(q2) } } Output: Queue(1, 2, 3, 4, 5) 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("for", "geeks") val q2 = Queue("geeks") // Applying ++=() method q2.++=(q1) // Display output print(q2) } } Output: Queue(geeks, for, geeks) Like Article Suggest improvement Previous Scala Queue :+() method with example Next Scala Queue +:() method with example Share your thoughts in the comments Add Your Comment Please Login to comment...