Local var life

main.dart

Future<void> repeat(void Function() repeat) async {
  while (true) {
    await Future.delayed(Duration(seconds: 1));
    repeat();
  }
}

void test() {
  int a = 7;
  repeat(() {
    print('Here! $a');
  });
  repeat(() {
    a += 1;
  });
  a = 5;
}

void main() {
  print('Start');
  test();
  print('End');  
}