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kotlinlang

I'm trying to follow the examples in here <https://developer.android.com/jetpack/compose/state>
```var signInState by rememberSaveable { mutableStateOf("login") }
if(signInState == "login") {
    Login(state = signInState)
}```
 I want to switch states by clicking the button like below
```@Composable
fun Login(state: String) {
            TextButton(
                onClick = { state = "signup" },
                colors = ButtonDefaults.textButtonColors(
                    backgroundColor = Color(0x00FFFFFF),
                    contentColor = Color.White,
                    disabledContentColor = Color(0x00FFFFFF),
                ),
            ) {
                Text("Create Account")
            }
}```
and then I get an error on
```onClick = { state = "signup" },```
that says `Val cannot be reassigned`

you could do
```fun Login(state: String, onStateChange: (String) -&gt; Unit) {}```

Yes, you try to reassign the argument handed over to the functions. That's not possible in Kotlin.

Yea i was reading the docs and it looks like function args are val's and aren't mutable

Ah as <@U646TGYUB> answered a little faster. use a callback to to change your state. The example in the state hoisting doc might be a good starting point <https://developer.android.com/jetpack/compose/state#state-hoisting>

oh ok I see now
```onStateChange = { signInState = it }```
is the callback which I run on button click
```onClick = { onStateChange("signup") }```


I'm using the string state to switch between a login/signup/password reset view
```var signInState by rememberSaveable { mutableStateOf("login") }
if(signInState == "login") {
    Login(onStateChange = { signInState = it })
}else if(signInState == "signup"){
    Signup(onStateChange = { signInState = it })
}else if(signInState == "forgot"){
    ForgotPassword(onStateChange = { signInState = it })
}```
Am I able to set the string another way? Other than
```onClick = { onStateChange("forgot") },```


```Login(onStateChange = { signInState = "signup" })```
