class constructors in dart

main.dart

// Class constructors

void main() {
  
  Human june = Human(165, 120);
  print(june.height);
  print(june.weight);
  
  Human tony = Human(170, 140);
  print(tony.height);
  print(tony.weight);
}

class Human {
  
  // property
  double height;
  double weight;
  int age = 24;
  
  // constructor
//   Human({double height, double weight}) {
//     this.height = height;
//     this.weight = weight;
//   }
  
  Human(this.height, this.weight);
  
  // method
  void grow(int numberOfYears) {
    age = age + numberOfYears;
  }
  
}