The answers we give below might not be very convincing because the
example program is so small. It might help to imagine a large one.
- We wouldn't have to memorize (or even know) the formula for
computing base two logarithms.
- We wouldn't have to duplicate the formula for base two logarithms
every time we needed to compute one. It appears three times in the
example program, which is probably tolerable. But what if it appeared
dozens or even hundreds of times? Every time it appears is another
opportunity for making a typographical mistake.
Return to lesson.