Question

这对codewars.com来说是一个挑战，但我无法弄清楚为什么这个while循环不起作用

def digital_root(n):
    # Creating variable combine to have the sum
    combine = 0
    # as long as n is more than two numbers.
    while n > 10:
        # converting n to string to iterate
        for i in str(n):
            # getting the sum each element in n
            combine += int(i)
        # reset n to be equal to the combined result
        n = combine
    return combine

此外，任何解决方案都将受到赞赏，这里是挑战的链接 https://www.codewars.com/kata/sum-of-digits-slash-digital-root

Answer 1

有趣;）

def digital_root(n):
    return n if n < 10 else digital_root(sum(int(i) for i in str(n)))

Answer 2

很高兴您正在更新n，但combine呢？也许在每次迭代结束时都需要重置？

Answer 3

我会做以下事情：

def digital_root(n):
    combined = 0
    while True:
        for i in str(n):
            combined += int(i)

        print combined

        # this is the condition to check if you should stop
        if len(str(combined)) < 2:
            return combined
        else:
            n = combined
            combined = 0

编辑：您也可以在不转换为str的情况下执行此操作：

def digital_root(n):
    combined = 0
    while True:
        for i in str(n):
            combined += int(i)
        print combined
        if combined < 10:
            return combined
        else:
            n = combined
            combined = 0

我不知道为什么这个while循环不会停止迭代

3 个答案: