Scala Stack exists() method with example

In Scala Stack class, the exists() method is utilized to check whether a predicate holds for any of the elements of the stack.

Method Definition: def exists(p: (A) => Boolean): Boolean

Return Type: It returns true if the predicate holds true for any of the elements of the stack or else returns false.

Example #1:

// Scala program of exists()
// 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 exists method
        val result = s1.exists(x => {x % 7 == 0})

        // Display output
        println("Element divisible by 7 exists: " + result)
    }
}

Output:

Stack(1, 3, 2, 7, 6, 5)
Element divisible by 7 exists: true

Example #2:

// Scala program of exists()
// 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 exists method
        val result = s1.exists(x => {x == 10})

        // Display output
        println("Element 10 exists: " + result)
    }
}

Output:

Stack(1, 3, 2, 7, 6, 5)
Element 10 exists: false