Question: Write functionsingleDigit(N)to take a positive integerNas an input and add the digits of the input repeatedly until the result has a single digit. For example:

Write functionsingleDigit(N)to take a positive integerNas an input and add the digits of the input repeatedly until the result has a single digit.

For example:

TestResultprint(singleDigit(48)) 3 print(singleDigit(198)) 9 

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