Q:

Scala program to add an item in the queue using enqueue() method

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YasminRadwan26
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2022-07-09
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Here, we will create a queue using the Queue collection class. Then we will add an item into the queue using enqueue() method and then 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.

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YasminRadwan26
2022-07-09
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Program/Source Code:

The source code to add an item in the queue using enqueue() method is given below. The given program is compiled and executed on the ubuntu 18.04 operating system successfully.

// Scala program to add an item in queue
// using enqueue() method

import scala.collection.immutable._

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

    println("Queue elements:");
    queue.foreach((ele: Int) => print(ele + " "))

    queue = queue.enqueue(60);

    println("\nElements after enqueue operation: ")
    queue.foreach((ele: Int) => print(ele + " "))

    println();
  }
}

Output:

Queue elements:
10 20 30 40 50 
Elements after enqueue operation: 
10 20 30 40 50 60

Explanation:

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

import scala.collection.immutable._

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. The queue contains integer elements. Then we added item 60 into the queue using enqueue() method. After that, we printed the updated queue on the console screen.

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