判断一个数是几位数

number = int(input("请输入数字："))           
count = 1
while number // 10**count > 0:
    count =count +1
else:
    print("这是一个 %s 位数！" % count)

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while True:
    num = int(input("请输入一个数字："))
    count = 1
    while num//10 >= 0:
        num = num//10
        count = count + 1
    print(count)