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:

Scala

// 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) 
    
    } 
} 

Output:

true

Example #2:

Scala

// 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) 
    
    } 
} 

Output:

false