Scala Stack apply() method with example

In Scala Stack class, the apply() method is utilized to return an element at a given position in the stack. The top of the stack corresponds to the element at 0^th position and so on.

Method Definition: def apply(idx: Int): A

Return Type: It returns an element at a given position in the stack.

Example #1:

// Scala program of apply()
// method

import scala.collection.mutable.Stack

// Creating object
object GfG
{

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

        // Creating a stack
        val s1 = Stack(1, 2, 3, 4, 5)

        // Print the stack
        println(s1)

        // Applying apply method
        val result = s1.apply(0)

        // Display output
        println("Element at 0th position: " + result)

    }
}

Output:

Stack(1, 2, 3, 4, 5)
Element at 0th position: 1

Example #2:

// Scala program of apply()
// method

import scala.collection.mutable.Stack

// Creating object
object GfG
{

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

        // Creating a stack
        val s1 = Stack("C++", "Java", "Python", "Scala")

        // Print the stack
        println(s1)

        // Applying apply method
        val result = s1.apply(2)

        // Display output
        println("Element at 2nd position: " + result)

    }
}

Output:

Stack(C++, Java, Python, Scala)
Element at 2nd position: Python