sublime247

import 'dart:math';
void main() {
  print('Circle1:');
   Circle circle1 = Circle.circle1();
     circle1.getArea(1);
     circle1.getCircumference(1);
     circle1.getDescription('1', 'red');
      circle1.getColor('red');
  
   print('');

sublime247

import 'dart:math';
void main() {
  print('Circle1:');
   Circle circle1 = Circle.circle1();
     circle1.getArea(1);
     circle1.getCircumference(1);
     circle1.getDescription('1', 'red');
      circle1.getColor('red');
  
   print('');

sublime247

void main() {
  for (int i = 0; i < 5; i++) {
    print('hello ${i + 1}');
  }
}