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  1. Recursive Digit Sum
  2. Discussions

Recursive Digit Sum

  • jose157
     + 0 comments

    Like others said, converting str to int and doing calculations won't work for the input test cases and Python string conversion defaults.

    Doing digit by digit conversions avoids the problem.

    My solution:

    def superDigit(n, k):
    # Write your code here
    sum_of_digits = 0
    for digit in n:
        sum_of_digits += int(digit)
    sum_of_digits *= k
    if sum_of_digits < 10:
        return sum_of_digits
    else:
        return superDigit(str(sum_of_digits), 1)