Add an example
diff --git a/example/example.dart b/example/example.dart
new file mode 100644
index 0000000..de6432f
--- /dev/null
+++ b/example/example.dart
@@ -0,0 +1,18 @@
+// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'package:charcode/charcode.dart';
+
+void main() {
+  print(String.fromCharCodes([
+    $E,
+    $x,
+    $a,
+    $m,
+    $p,
+    $l,
+    $e,
+    $exclamation,
+  ]));
+}