The final parameter or value of the val function or in Kotlin?

Question

Why does Kotlin remove the final or val parameter, which is very useful in Java?

fun say(val msg: String = "Hello World") {
    msg = "Hello To Me" // would give an error here since msg is val    
                        //or final
    ...
    ...
    ...
}

Answer 1

The parameters of the Kotlin function are final. There is no keyword val or final, as it is by default (and cannot be changed).

Answer 2

After supporting the modified Kotlin M5.1 settings , in earlier versions that can be achieved with

fun foo(var x: Int) {
  x = 5
}

According to Kotlin developers, the main reasons for removing this feature below are

• , : , , ( ).

• : "val" "var" , ( , ).

• , , , "val" "var" infront for-loop.

. val. . -

fun say(val msg: String) {
    var tempMsg = msg
    if(yourConditionSatisfy) {
       tempMsg = "Hello To Me"
    }
}