class01 constructor

class01constructor.dart

void main(){
  
  final m1 = Model(0, b:1);
  m1.a;
  m1.b;
  
  final m2 = Model.named(10);
  m2.a;
  m2.b;
  
  final fm1 = FinalModel(a: 11);
  // fm1.a = 22; // err -> final
  
  const cm1 = const ConstModel(a: 22);
  // cm1 = const ConstModel(a:33);  // err -> const
  // cm1.a = 44; // err -> const
  
}

class Model{
  int a;
  int b;
  Model(this.a, {required this.b});
  Model.named(int c):a = c+1, b = c+2;
}

class FinalModel{
  final int a;
  FinalModel({required this.a});
}

class ConstModel{
  final int a;
  const ConstModel({required this.a});
}