zlacker

>>jstrie+(OP)
> As a result, solutions using strings are disallowed on problem sets and quizzes until they are taught. However, the few students who have prior Python programming experience may be tempted to find digit length without loops using a variant of the following (for our purposes) invalid solution.

Wow. this is one of the reasons I hated school. No programmatic reason what given for why a string solution couldnt be used, only an arbitrary reason. Here students may have knowledge from self teaching or whatever, but they are unallowed to use that knowledge because "reasons".

To any teacher that thinks its a good idea to punish students for thinking outside the box: shame on you. All youre going to end up doing is crushing enthusiasm and/or creating drones. Please dont.

>>svnpen+Jm
It's also not great advice to be so ridgid in this case... Having written numerical grading code, I learned the hard way that log10 based methods of counting SF is a very bad idea (fp errors occur toward but not at word precision limit) counting string length with some solid regex for extracting integer fraction and exponent parts on the other hand can handle any input precision.