Question

Write a program that allows the user to enter a series of exam scores. The number of scores the user can enter is not fixed; they can enter any number of scores they want. The exam scores can be either integers or floats. Then, once the user has entered all the scores they want, your program will calculate and print the average of those scores. After printing the average, the program should terminate.

You need to use a while loop to allow the user to enter numbers, one at a time, until some numeric sentinel value is entered. I recommend having a sentinel like 9999, something unlikely to be confused with an exam score. If the user enters a score < 0 or > 100 that is not the sentinel value then that score is to be rejected. Each time a legit score is entered, however, it should be added (appended) to a list.

Once the user has entered all the numbers they want, calculate and display the average of the scores rounded to 1 decimal place.

To get full credit, you need to do the following.

• Use a while-loop to allow the user to enter any number of exam scores, one number per line, until a sentinel value is entered.
• Legitimate exam scores should be added to a python list; bogus scores should be rejected. If a bogus score is entered, have the user reenter the score. Don't just use a simple accumulator here; use a list to collect good scores.
• Once all scores have been entered, calculate the average of the scores using the list, in any way you see fit. Rounded to 1 decimal place. Once the while loop has ended, then print the number of scores and the score averag.
• Put your name in a comment near the top of the program file.
• Have the output statement give the number of scores averaged as well as the average itself.

Here is a possible program run using four scores. The sentinel value here is 9999. You may choose your own wording for the prompt string and output string.

If the user enters a bogus score, your output should look similar this.

Answer 1

Note: Could you plz go this code and let me know if u need any changes in this.Thank You
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list = []

# initialize sum and counter

sum = 0.0
cnt = 0
avg = 0.0
SENTINEL = 9999

# To take input from the user,

n = float(input('Enter n: '))

# This loop continues to iterate until the user enters 9999

while n != 9999:
if n < 0 or n > 100:
print '** Invalid Score **'
else:
list.append(n)
cnt = cnt + 1
n = float(input('Enter n: '))

# calculating the sum in list elements

for i in list:
sum = sum + i

# calculating average

avg = sum / cnt

# Displaying output

print 'Average:%.1f' % avg

          

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Output :

Python 3.6.1 (default, Dec 2015, 13:05:11) [GCC 4.8.2] on linux Enter n: 101 *Invalid Score Enter n: -101 *Invalid Score Enter n: 56 Enter n: 67 Enter n: 78 Enter n: 87 Enter n: 76 Enter n: 65 Enter n: 54 Enter n: 43 Enter n: 90 Enter n: 98 Enter n: 567 *Invalid Score Enter n: 98 Enter n: 9999 Average: 73.8

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Screen Shot of program( Am providing the screen shot of program bec,the indentation is important in python other u may get error while executing program)

_____________Thank You