Data update

Task/Undefined-values/Ada/undefined-values.adb

@@ -0,0 +1,23 @@
+pragma Initialize_Scalars;
+with Ada.Text_IO;  use Ada.Text_IO;
+
+procedure Invalid_Value is
+   type Color is (Red, Green, Blue);
+   X : Float;
+   Y : Color;
+begin
+   if not X'Valid then
+      Put_Line ("X is not valid");
+   end if;
+   X := 1.0;
+   if X'Valid then
+      Put_Line ("X is" & Float'Image (X));
+   end if;
+   if not Y'Valid then
+      Put_Line ("Y is not valid");
+   end if;
+   Y := Green;
+   if Y'Valid then
+      Put_Line ("Y is " & Color'Image (Y));
+   end if;
+end Invalid_Value;