September Morn Update

Task/Digital-root/Visual-Basic-.NET/digital-root.visual

@@ -0,0 +1,20 @@
+Module Module1
+
+    Function DigitalRoot(num As Long) As Tuple(Of Integer, Integer)
+        Dim additivepersistence = 0
+        While num > 9
+            num = num.ToString().ToCharArray().Sum(Function(x) Integer.Parse(x))
+            additivepersistence = additivepersistence + 1
+        End While
+        Return Tuple.Create(additivepersistence, CType(num, Integer))
+    End Function
+
+    Sub Main()
+        Dim nums = {627615, 39390, 588225, 393900588225}
+        For Each num In nums
+            Dim t = DigitalRoot(num)
+            Console.WriteLine("{0} has additive persistence {1} and digital root {2}", num, t.Item1, t.Item2)
+        Next
+    End Sub
+
+End Module