hngstage 1 task

main.dart

import 'dart:math';

class Circle {
  double? radius;
  String? color;

  Circle()
      : radius = 1,
        color = 'red';

  Circle.withColor({this.radius}) : color = 'red';

  Circle.withAll({this.color, this.radius});

  double getArea() {
    return (pi * pow(radius!, 2));
  }

  double getCircumference() {
    return (2 * pi * radius!);
  }

  String getDescription() {
    return "Radius: $radius Color: $color";
  }

  String getColor() {
    return color!;
  }
}

void runExample({required int circleNumber,String? color,double? radius,}) {
  Circle circle;
  if (color == null && radius == null){
    circle = Circle();
  }else if (color == null && radius != null){
    circle = Circle.withColor(radius: radius);
  }else{
    circle = Circle.withAll(color: color,radius: radius);
  }

  print("Circle $circleNumber:");
  print("Area: ${circle.getArea()}");
  print("Circumference: ${circle.getCircumference()}");
  print("Description: ${circle.getDescription()}");
  print("Color: ${circle.getColor()}\n\n");
}

void main() {
  runExample(circleNumber: 1);
  runExample(circleNumber: 2,radius: 2);
  runExample(circleNumber: 3,radius: 2,color: "blue");
}