Flutter. Error Can't access 'this' in a field initializer to read 'a'. var c = a + 1; ^?

Question

Dart

Hello connoisseurs. Please help me figure out why it is not possible to declare a variable c using another variable. Here is my code.

class why extends StatefulWidget {
@override
_whyState createState() => _whyState();
}
class _whyState extends State {

int a = 1;
var c = a + 1;

@override
Widget build(BuildContext context) {
return Container();
}
}

Answer 1

of course it won’t work, it’s not js or python (it seems to work there), your variables are at the same level, either take out “a” as global, or initialize “c” in the function

Answer 2

late var c = a + 1;
https://dart.dev/guides/language/language-tour#lat...