doubt

basic.dart

import 'package:http/http.dart' as http;


void main() async{
  int i = 1;
  bool run = true;

  var url = 'http://example.com/whatsit/create';
  var future =
      http.post(url, body: {'name': 'doodle', 'color': 'blue'});
  future.then((response){
    print('Response status: ${response.statusCode}');
    print('Response body: ${response.body}');
  });

  while(true){ //why isn't the loop blocked by the http request ? how does it complete while the loop is executing ?
    print(i++);
    await sleep(); //this is required to return control to the event queue ? why ? why does it take adding a task to the queue to process the task prior to it ? isn't it FIFO based ?
  }
}

Future sleep() {
   return new Future.delayed(const Duration(milliseconds: 1), () => "1");
}