<Why can't you change a property value permanently...

# stackoverflow

[user]

Why can't you change a property value permanently in kotlin?
Here's the code:
class Person(var firstName: String, var lastName: String) {
var fullName: String = firstName + lastName

fun fullName() = firstName + lastName

override fun toString(): String {
return fullName()
}
}
fun main(){

val test = Person("test", "fortest1")


test.lastName = "fortest2"


println(test.fullName)
}

The result will only be testfortest1.
It looks like you are working with a copy of test once test is created.