Hi, I have used this code on 4/15:
number == 
for digit in str(number):
It compiles fine, but then throws this error:
"Your function fails on digit_sum(434). It returns 4 when it should return 11."
I am stumped--what have I done wrong to produce this error? (FYI, if I take out the square brackets in the "return" line, it throws a different error, so I kept all three brackets/parentheses on that line.)