Running the following on python

Question

trying to get a program to enter a students name and score, test it to make sure score is a vaule >=0 and <=100 and save results to a file and loop back

 gradeFile = open("grade.dat","a")
    Score = "0"
    while Score>=0:
        Name = raw_input("What is the students's name?: ")
        Score = float(raw_input("What is the students's score?: "))
         while Score <0 or Score >100 :
            print("ERROR: the grade cannot be less than 0 or more than 100")
            Score = float(raw_input("What is the students's score?: "))
        gradeFile.write(Name+"\n")
        gradeFile.write(Score+"\n")
    gradeFile.close()
    print("Data saved to grade.dat")

gradeFile.write(Score+"\n") gives you error TypeError: unsupported operand type(s) for +: 'float' and 'str', you can change it to gradeFile.write(str(Score)+"\n") — 4d4c
– 4d4c, Commented Nov 25, 2013 at 1:42
You didn't ask a question. What question about your task do you need answered? — user2357112
– user2357112, Commented Nov 25, 2013 at 2:00

Steve P. · Accepted Answer · 2013-11-25 01:40:52Z

1

You need to have a way to exit the loop. For your outer loop, you automatically go in. Then you loop again until you get a valid score, via your inner loop, and you repeat. In your current configuration, there's no way to exit the loop.

Additionally, score should be a number, but you enter it as a string in Score = "0". When outputting, you're going to want to write str(Score) so that you can concatenate it with "\n".

I suggest that your outer loop have something like while Score >= 0 and userWantsToContinue. You can handle userWantsToContinue in whatever way you see fit.

answered Nov 25, 2013 at 1:40

Steve P.

14.7k9 gold badges46 silver badges74 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Nil · Accepted Answer · 2013-11-25 01:41:36Z

1

Your datatpe doesn't match

Score = "0"  # So, score is a string
while Score >= 0:  # Oh, thenm it's a integer?

answered Nov 25, 2013 at 1:41

Nil

2,3971 gold badge27 silver badges36 bronze badges

Collectives™ on Stack Overflow

Running the following on python

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related