My first Dart script

foobar.dart

class foobar {
  foo() {
    return '00';
  }

  bar() {
    return 7;
  }
}
main() {
  var fb = new foobar();
  print(fb.foo() is String);//true
  print(fb.bar() is int);//true
  var str = fb.foo() + fb.bar();
  print(str is String);//true
  print(str);//007
}