Scala Map clear() method with example

The clear() method is utilized to clear the map. value clear is a member of scala.collection.mutable.Map[String, Int].

Method Definition: def clear(): Unit

Return Type: It returns empty map.

Example #1:

// Scala program of clear()
// method

// Creating object
object GfG
{

    // Main method
    def main(args:Array[String])
    {

        // Creating a mutable map
        val m1 = scala.collection.mutable.Map("geeks" -> 5,
                                    "for" -> 3, "geeks" -> 1)

        // Applying clear method
        val result = m1.clear()

        // Displays output
        println(result)

    }
}

Output:

()

Here, a mutable map is used as clear() is a member of scala.collection.mutable.Map[String, Int].
Example #2:

// Scala program of clear()
// method

// Creating object
object GfG
{

// Main method
def main(args:Array[String])
{

// Creating a immutable map
val m1 = scala.collection.immutable.Map("geeks" -> 5,
                                "for" -> 3, "geeks" -> 1)

// Applying clear method
val result = m1.clear()

// Displays output
println(result)

}
}

Output:

prog.scala:16: error: value clear is not a member of scala.collection.immutable.Map[String, Int]
val result = m1.clear()
^
one error found

Here, one error is found as immutable map is utilized but clear method is a member of scala.collection.mutable.Map[String, Int].