Q3: Pick a Digit

Implement digit, which takes positive integers n and k and has only a single return statement as its body. It returns the digit of n that is k positions to the left of the rightmost digit (the one's digit). If k is 0, return the rightmost digit. If there is no digit of n that is k positions to the left of the rightmost digit, return 0.

Hint: Use // and % and the built-in pow function to isolate a particular digit of n.

def digit(n, k):
    """Return the digit that is k from the right of n for positive integers n and k.

    >>> digit(3579, 2)
    5
    >>> digit(3579, 0)
    9
    >>> digit(3579, 10)
    0
    """
    return ____

Contributors: Junyuan He

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