Scala Queue +=:() method with example

The +=:() method is utilized to add an element at the front of a queue.

Method Definition: def +=:(elem: A): Queue.this.type

Return Type: It returns the given queue with an element added at its front.

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("for", "geeks")

        // Applying +=:() method
        val result = q1.+=:("geeks")

        // Display output
        print(result)

    }
}

Output:

Queue(geeks, for, geeks)

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(2, 3, 4, 5)

        // Applying +=:() method
        val result = q1.+=:(1)

        // Display output
        print(result)

    }
}

Output:

Queue(1, 2, 3, 4, 5)