Scala Stack head() method with example

In Scala Stack class, the head() method is utilized to return the top element of the stack.

Method Definition: def head: A

Return Type: It returns the top element of the stack.

Example #1:

// Scala program of head()
// method

// Import Stack
import scala.collection.mutable._

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Creating stack
        val s1 = Stack(1, 3, 2, 7, 6, 5)

        // Print the stack
        println(s1)

        // Applying head method
        val result = s1.head

        // Display output
        print("Top element of the stack: " + result)

    }
}

Output:

Stack(1, 3, 2, 7, 6, 5)
Top element of the stack: 1

Example #2:

// Scala program of head()
// method

// Import Stack
import scala.collection.mutable._

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Creating stack
        val s1 = Stack(5, 3, 2, 7, 6, 1)

        // Print the stack
        println(s1)

        // Applying head method
        val result = s1.head

        // Display output
        print("Top element of the stack: " + result)

    }
}

Output:

Stack(5, 3, 2, 7, 6, 1)
Top element of the stack: 5