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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 ... ... ... } 
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Most Kotlin developers would agree that a val property is equivalent to a final property in Java. What if I tell you that this is not completely true and sometimes you might need a final val ? Opposite to Java, Kotlin properties are final by default unless they are explicitly marked as open!
Kotlin function parameters are final. There is no val or final keyword because that's the default (and can't be changed).
In Kotlin, You can pass a variable number of arguments to a function by declaring the function with a vararg parameter. a vararg parameter of type T is internally represented as an array of type T ( Array<T> ) inside the function body.
var is like a general variable and can be assigned multiple times and is known as the mutable variable in Kotlin. Whereas val is a constant variable and can not be assigned multiple times and can be Initialized only single time and is known as the immutable variable in Kotlin.
Kotlin function parameters are final. There is no val or final keyword because that's the default (and can't be changed).
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