HelloWorld

The sample code of the book named 'Dart: Up and running'

1. Preparation
	a. Download Google Dart from <https://www.dartlang.org/>
2. Installation
	a. Unzip the zip to a directory, for example: E:\Tools\Dart
	b. Double click the executable program named DartEditor under above unzipped directory to open an IDE for Dart.
	c. Select File -> Open Existing Folder...
	d. In the dialog, locate the path you place the sample code to import.
3. Run
	a. Right click one of the source files that shown in the Files view which is on left on the IDE.
	b. In the context menu, click the Run to run it.