DART  Static

// to make any variable universal for all object belongs to that class

// static is also applied to method of class

// static work without any constructor

int main(){

//   Square myShape = Square(); not need constructor static
  int side = Square.noOfSide;
  print(side);

//   Circle().getOurCircumference(radius: 20); // without static
  Circle.getOurCircumference(radius: 20);  // with static, call by this

// static work without any constructor as we seen above
}

class Square{
  static int noOfSide = 4;
}

class Circle{

  static const double pi = 3.1415926;

  static void getOurCircumference({double radius}){
    double circumference = 2 * pi * radius;
    print(circumference);
  }
}