The forall() method belongs to the concrete value members of the Class AbstractIterator. It is defined in the class IterableOnceOps. It tests whether a used predicate holds for all the elements of the stated collection. It may not terminate for the infinite sized collection.
Method Definition : def forall(p: (A) => Boolean): Boolean
Return Type : It returns true if the stated collection is empty or if the given predicate p holds for all elements of this collection, else it returns false.
Example #1:
// Scala program of forall() // method // Creating object object GfG
{ // Main method
def main(args : Array[String])
{
// Creating an Iterator
val iter = Iterator( 3 , 6 , 15 , 12 , 21 )
// Applying forall method
val result = iter.forall(x => {x % 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 an Iterator
val iter = Iterator( 3 , 6 , 15 , 19 , 21 )
// Applying forall method
val result = iter.forall(x => {x % 3 == 0 })
// Displays output
println(result)
}
} |
Output:
false