Question

grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]

def grades_sum(grades):
    sum = 0
    for i in grades:
        sum += grades[i]
print(grades_sum(grades))

That’s my code and I’m trying to understand why I’m getting an out of index traceback.

Answer 1

You don’t need to do grade[i] because you’re already referencing the elements in the list – all you need to do it replace that with a plain old i

However, there is already a builtin function for this – sum

print(sum(grades))