Scala Map foreach() method with example

The foreach() method is utilized to apply the given function to all the elements of the map.

Method Definition: def foreach(f: ((A, B)) => Unit): Unit

Return Type: It returns all the elements of the map after applying the given function to each of them.

Example #1:

// Scala program of foreach()
// method

// Creating object
object GfG
{

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

        // Creating map
        val m1 = Map(3 -> "geeks", 1 -> "for", 2 -> "cs", 6 -> "geeks")

        // Applying foreach method and
        // displaying output
        val result = m1.foreach(x => println("key=" + x._1 + ", value=" + x._2))

    }
}

Output:

key=3, value=geeks
key=1, value=for
key=2, value=cs
key=6, value=geeks

Example #2:

// Scala program of foreach()
// method

// Creating object
object GfG
{

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

        // Creating map
        val m1 = Map(3 -> "geeks", 1 -> "for", 2 -> "cs", 3 -> "geeks")

        // Applying foreach method and
        // displaying output
        val result = m1.foreach(x => println("key=" + x._1 + ", value=" + x._2))

    }
}

Output:

key=3, value=geeks
key=1, value=for
key=2, value=cs

So, the identical elements are taken only once.