Scala List forall() method with example

The forall() method is utilized to check if the given predicate satisfies all the elements of the list 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 list else it returns false.

Example #1:

// Scala program of forall()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {
        // Creating a list
        val m1 = List(3, 6, 12, 9, 21)

        // Applying forall method
        val result = m1.forall(y => {y % 3 == 0})

        // Displays output
        println(result)

    }
}

Output:

true

Example #2:

// Scala program of forall()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {
        // Creating a list
        val m1 = List(3, 6, 2, 9, 21)

        // Applying forall method
        val result = m1.forall(y => {y % 3 == 0})

        // Displays output
        println(result)

    }
}

Output:

false