Scala Set forall() method with example

The forall() method is utilized to check if the given predicate satisfies all the elements of the set or not.

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

Return Type: It returns true if the stated predicate holds true for all the elements of the set else it returns false.

Example #1:

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// Scala program of forall() 
// method 
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
        // Creating a set 
        val s1 = Set(3, 6, 12, 9, 21
          
        // Applying forall method 
        val result = s1.forall(y => {y % 3 == 0}) 
          
        // Displays output 
        println(result) 
      
    

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Output:

true

Example #2:

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// Scala program of forall() 
// method 
  
// Creating object 
object GfG 
  
    // Main method 
    def main(args:Array[String]) 
    
        // Creating a set 
        val s1 = Set(3, 7, 12, 9, 21
          
        // Applying forall method 
        val result = s1.forall(y => {y % 3 == 0}) 
          
        // Displays output 
        println(result) 
      
    

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Output:

false



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