final or val function parameter or in Kotlin?

Question

Why does Kotlin removed the final or val function 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

Kotlin function parameters are final. There is no val or final keyword because that's the default (and can't be changed).