digraph g {
	Start [shape=box];
	End [shape=box];
	Start -> End [style=dashed];
	Start -> "if (x < 0)" -> "throw" -> "Error exit" -> End;
	"throw" -> "return Math.sqrt(x)" [style=dashed];
	"if (x < 0)" -> "return Math.sqrt(x)" -> "Normal exit" -> End;
}