def digit_sum(n): if len(str(n)) > 1: for i in len(str(n)): sum += int(str(n[i])) return sum else: print n print digit_sum(12345) Does your digit_sum function take exactly one argument (a positive integer)? Your code threw a "'int' object is not iterable" error.
for i in len(str(n)):
len()? casting it to string is good, then you can loop over
n, but i don't see why you would use len then
good point, and I still have some problem
i now contains values of the list, not indexes so you can just add
int(i) tot sum
then after the loop, return the sum (containing the total)
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