Why am i getting a double value for adding integers in python?

Question

I wrote this function sum_of_digits which takes n (a number) and returns the sum of its digits

def sum_of_digits(n):
    sum = 0
    while n > 0:
        d = n%10
        sum+=d
        n/= 10
    return sum

print(sum_of_digits(9))

I have no clue what is going wrong, but the last statement print(sum_of_digits(9)) returns 10.000000000000004, and I cant figure how to correct it. Can anyone help me?

I have already tried rephrasing the same code in many different ways, I've tried using a for loop, and nothing I seem to do helps the code.

There are two division operators: `/` and `//`. The latter returns integer values if both arguments are integers. Also, it may be more efficient to use `divmod`. — hilberts_drinking_problem, Jan 01 '22 at 07:15
@hilberts_drinking_problem you taught me something new today. I thought that `//` would always return an integer result, but it turns out it does not. — Mark Ransom, Jan 01 '22 at 07:58
@MarkRansom I had to check as I was typing up the comment; I learned something new today too. Happy New Year! — hilberts_drinking_problem, Jan 01 '22 at 08:08

score 0 · Answer 1 · answered Jan 01 '22 at 08:28

0

Instead of division operator / try using floor division // to avoid this floating points errors.
Also, you may refer this post to understand this concept clearly.
Is floating point math broken?

answered Jan 01 '22 at 08:28

Python learner

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Why am i getting a double value for adding integers in python?

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