Concatenate Two Maps in Scala

The concatenation of Scala map is obtained by utilizing ++ operator.
Syntax :

def ++(xs: Map[(A, B)]): Map[A, B]

Return Type:
It returns a single map by concatenating two maps but it separates the identical keys.
Example #1:

// Scala program of concatenating
// two maps

// Creating object
object GfG
{

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

        // Creating the first map
        val m1 = Map("Nidhi" -> 23, "Rahul" -> 18)

        // Creating the second map
        val m2 = Map("Geeta" -> 22, "Rahul" -> 18)

        // Applying ++ operator
        val result = m1.++(m2)

        // Displays output
        println(result)

    }
}

Output:

Map(Nidhi -> 23, Rahul -> 18, Geeta -> 22)

As we can see in above example, we joined two maps by using ++ operator.
Example #2:

// Scala program of concatenating
// two maps

// Creating object
object GfG
{

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

        // Creating the first map
        val m1 = Map("geeks" -> 5, "for" -> 3)

        // Creating the second map
        val m2 = Map("geeks" -> 5, "cs" -> 2)

        // Applying ++ operator
        val result = m1.++(m2)

        // Displays output
        println(result)

    }
}

Output:

Map(geeks -> 5, for -> 3, cs -> 2)