Dart Const / Final

const_final.dart

import 'dart:math';

void main() {
  const String USER_NAME = 'nikk';
  // USER_NAME = 'wenyan'; => Error
  
  final String USER_ADDRESS = 'China';
  // USER_ADDRESS = 'United States'; => Error
  
  // ------------------------------------
  // Runtime Value Assignment
  
  // const int USER_AGE = gen();
  // print('const - $USER_AGE'); => Error
  
  final int AMY_ADDRESS = gen();
  print('final - $AMY_ADDRESS'); // => Works
  
  // try assign new value for final
  // AMY_ADDRESS = gen(); => Error
}


int gen() {
  return Random().nextInt(5);
}