So I have an assignment to do with data structures. This is bonus work so no teaching has been done on the subject.

I've used basic lists in python but never anything else. I may just be not thinking about this the right way and missing something.

I need to take a test grade input from the user from a test graded on a 100 point scale. 100-90 is an A, 89-80 is a B, 79-70 is a C, 69-65 is a D, and 64-0 is an F. The program then needs to determine the what letter grade the inputted score is and output it. My professor told me it can be done in 3 lines, but I just don't see how. It doesn't HAVE to be 3 lines, he just said it could be. He also said that no IF statements were needed.

Very confused and help would be greatly appreciated.

This post was edited by KratosGOW on Feb 12 2013 08:26pm

considering the hints, i'm guessing 1 line to set up the mapping, 1 line to get input, 1 line to produce output. if you dont need if statements, then your mapping must move from int -> letter grade. sounds like an array is good for that.

eg:

mapping = ['F', 'F', ....., 'D', 'D', 'D', ..... , 'A', 'A', 'A' ...]
score = cast_int(raw_input("enter grade 0-100"));
print mapping[score]

where your array is constructed in such a way that indexes 0 to 64 returns F, 65-69 D, etc etc.

of course that would fail if they enter invalid input (eg: 33.3, 101, "blahblah", -11, etc)

Wow.. Thank you so much. Yet again, I was looking too far into the problem. I like your solution. Not so elegant, but definitely pretty simple.

Thanks again!

starting with carteblanche's code, can be cheesy and cut it down to 2 lines


/e
even cheesier, 1 line!:


This post was edited by Azrad on Feb 12 2013 08:52pm

now that you mention it, we can compress into one line

print ["F", "F", ....][int(raw_input("enter grade 0-100\n"))];

gives you two extra lines for whatever else you want

Haha.. Yeah, I submitted this one being all cheeking and what not.. Maybe I can get some bonus bonus points.