For Loop in Scala

Scala Stack exists() method with example

Last Updated : 03 Nov, 2019

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

// 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

// 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

For Loop in Scala

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