...
public static void main(String[] args) throws VnanoException {

	// Create a scripting engine of Vnano (= Vnano Engine).
	VnanoEngine engine = new VnanoEngine();

	// Prepare the content of the script to be executed.
	String script =

		" int sum = 0;                 " +
		" for (int i=1; i<=100; i++) { " +
		"     sum += i;                " +
		" }                            " +
		" sum;                         " ;

	// Execute a script by Vnano Engine.
	long result = (Long)engine.executeScript(script);
	System.out.println("result: " + result);
}