Advice on Testing of the Program You need to test average, typical data values and test on and near data boundary values. In the case of this program that would mean you should test an average value like 2, 3, or 4, plus values on and near the boundaries like 0, 1, 2, 5, 6, and 7. It also might be a good idea to test some values that are way out of bounds - a value much less than 1, and a value much greater than 6.