We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Algorithms
  3. Recursion
  4. Recursive Digit Sum
  5. Discussions

Recursive Digit Sum

  • redalertmom_jo
     + 10 comments

    With recursion in Java. I don't understand the objections to recursion. It is good practice for logical thinking.

    static int superDigit(String number, int k) {
        if (number.length() > 1)
        {
            long sum = 0;
            for (int i = 0; i < number.length(); i++)
            {
                sum += Character.getNumericValue(number.charAt(i));
            }
            return superDigit(Long.toString(sum * k), 1);
        }
        else
            return Character.getNumericValue(number.charAt(0));

    }