for loop expressions w/ constant

When adding a class constant to a loop expression, it affects the constant that must be added in the expression. Suppose we have the two loop expressions below for figure sizes of 5 and 9. The third line of the table shows the general formula that would be used if we turned our figure's size into a constant named SIZE.

size	expression	relationship
5	8 * line + 16	16 = 3 * 5 + 1
9	8 * line + 28	28 = 3 * 9 + 1
SIZE	8 * line + (3 * SIZE + 1)

continued on the next slide ...