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Scala program to append a queue in another queue using the '++=()' method

Here, we are going to learn how to append a queue in another queue using the '++=()' method in Scala programming language?
Submitted by Nidhi, on June 17, 2021 [Last updated : March 12, 2023]

Scala - Append a Queue to Another

Here, we will create two queues using the Queue collection class and then we appended a queue in another queue using the "++=()" method. After that, we will print the updated queue on the console screen.

The Queue is a linear data structure, It follows the First In First Out (FIFO) property. We can insert and remove the item in the queue from different ends of the queue.

Scala code to append a queue in another queue using the '++=()' method

The source code to append a queue in another queue using the "++=()" method is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to append a queue in another queue
// using the "++=()" method

import scala.collection.mutable._

object Sample {
  // Main method
  def main(args: Array[String]) {
    var queue1 = Queue(10, 20, 30, 40, 50);
    var queue2 = Queue(60, 70);

    //Append queue2 in queue1.
    queue1 ++= queue2;

    println("Elements of queue1:");
    queue1.foreach((ele: Int) => print(ele + " "));
    println();
  }
}

Output

Elements of queue1:
10 20 30 40 50 60 70

Explanation

Here, we used an object-oriented approach to create the program. And, we imported Collection classes using the below statement,

import scala.collection.mutable._

And, we also created a singleton object Sample and defined the main() function. The main() function is the entry point for the program.

In the main() function, we created two queue queue1 and queue2 using Queue collection class. Then we appended queue2 in queue1 using "++=()" method and printed the updated queue on the console screen.

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