Finding sum of all numbers in list — python

Question

Im creating a program that takes input scores, adds them to a list and, using a for-loop, adds them all together displaying the total. Getting some problems though. Check it out Please..

scoreList = []
count = 0
score = 0
sum = 0
while score != 999:
    score = float(input("enter a score or enter 999 to finish: "))
    if score > 0 and score < 100:
        scoreList.append(score)
    elif (score <0 or score > 100) and score != 999:
        print("This score is invalid, Enter 0-100")
else:
    for number in scoreList:
        sum = sum + scoreList
print (sum)

Answer 1

The problem is simple:

for number in scoreList:
    sum = sum + scoreList

If you want to add each number in scoreList, you have to add number , not scoreList :

for number in scoreList:
    sum = sum + number

Otherwise, you're trying to add the whole list to sum , over and over, once per value. Which is going to raise a TypeError: unsupported operand type(s) for +: 'int' and 'list' … but really, there's nothing it could do which could be what you want.

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A simpler solution is to use the built-in sum function. Of course that would mean you need a different variable name, so you don't hide the function. So:

total_score = sum(scoreList)