Infinite loop for python program

Question

I have a problem with this code, this program should keep allowing you enter students until the number of passes reaches 8 or the total number of students reaches 10. However currently it just keeps asking for input and hence there is an infinite loop. How do I go about fixing this?

total_students=0
student_passes=0
student_failures=0

while (total_students <= 10) or (student_passes != 8):
        result=int(input("Input the exam result: "))
        if result>=50:
            student_passes = student_passes + 1
        else:
            student_failures = student_failures + 1
        total_students = total_students + 1

 print (student_passes)
 print (student_failures)

 if student_passes >= 8:
     print ("Well done")

But I only need either of those conditions to be true to end the loop. — Abdullah Jadoon
– Abdullah Jadoon, Commented Oct 10, 2017 at 10:07
@AbdullahJadoon You need both conditions to be true to stay in the loop. — khelwood
– khelwood, Commented Oct 10, 2017 at 10:07

Anton vBR · Accepted Answer · 2017-10-10 10:14:41Z

2

Change or to and. While both are true you continue:

total_students=0
student_passes=0
student_failures=0

while (total_students != 10) and (student_passes != 8): # != or <
        result=int(input("Input the exam result: "))
        if result>=50:
            student_passes += 1
        else:
            student_failures += 1
        total_students +=1

print (student_passes)
print (student_failures)

edited Oct 10, 2017 at 10:14

answered Oct 10, 2017 at 10:08

Anton vBR

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6 Comments

Abdullah Jadoon Over a year ago

Thanks! Any reason why it waits for 11 inputs until the program terminates? It should be 10.

Anton vBR Over a year ago

@AbdullahJadoon We could just change to != 10, as we are incrementing the value. When it hits 10 we dont want to continue. Your error was <= 10, which should be <10

Abdullah Jadoon Over a year ago

brilliant thanks very much for your help. My work here is done.

Anton vBR Over a year ago

@AbdullahJadoon Also notice you can use += 1 to increment, e.g. total_students +=1. Makes things more readable

Abdullah Jadoon Over a year ago

Oh wow, I didn't know you could do this. This is great, thanks!

|

Kunal Jadhav · Accepted Answer · 2017-10-10 10:09:15Z

0

you might have to revisit your code. I m not python expert, however I believe you should modify the condition for while loop.

such as while (total_students <= 10) or (student_passes <= 8): this will resolve your problem.

total_students=0
student_passes=0
student_failures=0

while (total_students <= 10) or (student_passes <= 8):
        result=int(input("Input the exam result: "))
        if result>=50:
            student_passes = student_passes + 1
        else:
            student_failures = student_failures + 1
        total_students = total_students + 1

 print (student_passes)
 print (student_failures)

 if student_passes >= 8:
     print ("Well done")

answered Oct 10, 2017 at 10:09

Kunal Jadhav

12 bronze badges

Comments

p.mathew13 · Accepted Answer · 2017-10-10 10:16:25Z

0

You should use and instead of or to meet your requirement.

total_students=0
student_passes=0
student_failures=0

while (total_students <= 10 and student_passes < 8):
        result=int(input("Input the exam result: "))
        if result>=50:
            student_passes = student_passes + 1
        else:
            student_failures = student_failures + 1
        total_students = total_students + 1

print (student_passes)
print (student_failures)

if student_passes >= 8:
    print ("Well done")

answered Oct 10, 2017 at 10:16

p.mathew13

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