Count and Sum Digits

本文最后更新于：2023年3月29日 上午

Count Digits

NO.1

This is a transfer int to str. This is not a math solution

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def count_digits1(x):
    x=str(x)
    return len(x)

NO.2

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def count_digits2(x):
    count = 0
    while x != 0:
        x = x // 10
        count = count +1
    return count

NO.3

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def count_digits3(n):   #Recursion
	if n < 10:
        return 1
    else:
        return (1 + count_digits3(n //10))

This is about Recursion.

Sum Digits

NO.1

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def sum_digit1(n):
    if n < 10:
        return n
    else:
        return (n%10 + sum_digit1(n//10))

NO.2

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def sum_digit2(n):
    sum=1
    while n != 0:
        sum = sum * (n%10)
        n = n // 10
    return sum