Question

Write the recursive version of the function decimal which takes in n, a number, and returns a list representing the decimal representation of the number.

def decimal(n): 
    """Return a list representing the decimal representation of a number. 

    >>> decimal(55055) 
    [5, 5, 0, 5, 5] 
    >>> decimal(-136) 
    ['-', 1, 3, 6] 
    """

Answer 1

def decimal(n):
    """Return a list representing the decimal representation of a number. 

    >>> decimal(55055) 
    [5, 5, 0, 5, 5] 
    >>> decimal(-136) 
    ['-', 1, 3, 6] 
    """
    if n < 0:
        return ['-'] + decimal(-n)
    elif n < 10:
        return [n]
    else:
        return decimal(n // 10) + [n % 10]


# Testing the function here. ignore/remove the code below if not required
if __name__ == '__main__':
    print(decimal(55055))
    print(decimal(-136))