Question

this code is not working for me.. if enter 100 it is not showing the grades insted asking for score again..

#Python program that prompts user to enter the valuesof grddes . Then calculate the total scores , #then find average of total score. Then find the letter grade of the average score. Display the #results on python console.
#grades.py
def main():
    #declare a list to store grade values
    grades=[]
    repeat=True
    #Set variables to zero
    total=0
    counter=0
    average=0
    gradeLetter=''
    #Repeat loop till user enters -1 to stop
    while repeat:
        #try-catch block to check if input is number
        try:
            value = int(input('Enter score : '))
            #Check if value is -1
            if value==-1:
                #set repeat to False to stop execution
                repeat=False
            else:
                #increment the counter by 1
                counter=counter+1
                #add value to total
                total=total+value
                #add value to grades
                grades.append(value)
        except ValueError:
            print('Invalid input')
    #calculate the average score
    average=total/counter
    #find the letter grade for average value
    if average>=92.50 and average<=100:
        gradeLetter='A'
    elif average>=88.5 and average<=92.49:
        gradeLetter='B+'
    elif average>=82.50 and average<=88.49:
        gradeLetter='B'
    else:
        gradeLetter = 'F'
    #Print total score
    print('Total Score',total)
    # Print average
    print('Average',average)
    # Print gradeLetter
    print('Letter Grade',gradeLetter)
#calling main method
main()

Answer 1

Here is the answer..

If you need score for each grade then below is the code

CODE:

def main():
#declare a list to store grade values
grades=[]
repeat=True
#Set variables to zero
total=0
counter=0
average=0
gradeLetter=''
#Repeat loop till user enters -1 to stop
while repeat:
#try-catch block to check if input is number
try:
value = int(input('\nEnter score : '))
#Check if value is -1
if value==-1:
#set repeat to False to stop execution
repeat=False
else:
#increment the counter by 1
counter=counter+1
#add value to total
total=total+value
#add value to grades
grades.append(value)
#calculate the average score
average=total/counter
#find the letter grade for average value
if average>=92.50 and average<=100:
gradeLetter='A'
elif average>=88.5 and average<=92.49:
gradeLetter='B+'
elif average>=82.50 and average<=88.49:
gradeLetter='B'
else: gradeLetter = 'F'
#Print total score
print('Total Score',total)
# Print average
print('Average',average)
# Print gradeLetter
print('Letter Grade',gradeLetter)
except ValueError:
print('Invalid input')
main()

OUTPUT:

If you want result at end of the grades then your code is working fine....Here is the outputs

OUTPUT:\

If you have any doubts please COMMENT...

If you understand the answer please give THUMBS UP..