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Calculate the sum of all digits of the given integer n

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Question

Implement a recursive python function digit_sum(n) to calculate the sum of all digits of the given integer n. Then, implement a recursive python function to compute the digital root digital_root(n) of the given integer n.

Your function must use the digit_sum function. The digital root of a number is calculated by taking the sum of all of the digits in a number, and repeating the process with the resulting sum until only a single digit remains.

For example, if you start with 1969, you must first add 1+9+6+9 to get 25. Since the value 25 has more than a single digit, you must repeat the operation to obtain 7 as a final answer. Your function digital_root(n) must use digit_sum function.Your recursive functions must not use loops

Reference no: EM132354740

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