FUNCTION Main()
   LOCAL a, b

   a := "N"
   b := "N"
   ? "a =", a
   ? "b =", b

   IF a = b
      ? "a = b: TRUE"
   ELSE
      ? "a = b: FALSE"
   ENDIF

   IF ValType(42) = "N"
      ? "ValType test: TRUE"
   ELSE
      ? "ValType test: FALSE"
   ENDIF

   RETURN NIL