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Scala program to add items into the queue using the '+:()' method

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

Scala - Add Element to Queue (Using +:() Method)

Here, we will create a queue using the Queue collection class and then we add an item into the 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 add items into the queue using the '+:()' method

The source code to add items into the 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 add items into queue using
// the "+:()" method

import scala.collection.mutable._

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

    //Append queue2 in queue1.
    queue = queue.+:(60)

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

Output

Elements of queue:
60 10 20 30 40 50

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 a queue queue using the Queue collection class. Then we added item 60 into the queue using the "+:()" method and printed the updated queue on the console screen.

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