Scala Stack count() method with example

In Scala Stack class, the count() method is utilized to count the number of elements in the stack that satisfies a given predicate.

Method Definition: def count(p: (A) => Boolean): Int

Return Type: It returns the count the number of elements in the stack that satisfies a given predicate.

Example #1:

// Scala program of count()
// method

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

// 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 count method
        val result = s1.count(z => true)

        // Displays output
        print("Number of element in stack: " + result)
    }
}

Output:

Stack(1, 2, 3, 4, 5)
Number of element in stack: 5

Example #2:

// Scala program of count()
// method

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

// 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 count method
        val result = s1.count(z => {z % 2 == 0})

        // Displays output
        print("Number of element in stack divisible by 2: " + result)
    }
}

Output:

Stack(1, 2, 3, 4, 5)
Number of element in stack divisible by 2: 2