Dart编程实例 - break和label

void main() {

   outerloop: // This is the label name

   for (var i = 0; i < 5; i++) {

      print("Innerloop: ${i}");

      innerloop:

      for (var j = 0; j < 5; j++) {

         if (j > 3 ) break ;

         // Quit the innermost loop

         if (i == 2) break innerloop;

         // Do the same thing

         if (i == 4) break outerloop;

         // Quit the outer loop

         print("Innerloop: ${j}");

      }

   }

}