ATM machines allow 4 or 6 digit PIN codes and PIN codes cannot contain anything but exactly 4 digits or exactly 6 digits. If the function is passed a valid PIN string, return true, else return false
时间: 2024-04-03 13:34:06 浏览: 96
Sure, here's a Python function that checks if a PIN string is valid according to the given conditions:
```python
def validate_pin(pin):
if len(pin) == 4 or len(pin) == 6:
if pin.isdigit():
return True
return False
```
You can use this function by passing a PIN string to it. It will return `True` if the PIN is valid (contains exactly 4 or 6 digits only), and `False` otherwise.
相关问题
Write a python function proddigits() that inputs a positive integer number and returns the product of digits of that number.
Here's a Python function `proddigits()` that takes a positive integer as input and returns the product of its digits:
```python
def proddigits(number):
product = 1
while number > 0:
digit = number % 10
product *= digit
number //= 10
return product
```
This function uses a while loop to iterate through each digit of the input number. It calculates the product of each digit by using the modulus operator (%) to get the last digit and then dividing the number by 10 to shift the digits to the right. The loop continues until the number becomes 0.
Here's an example of how to use this function:
```python
number = 12345
result = proddigits(number)
print("Product of digits of", number, "is", result)
```
This would output:
```
Product of digits of 12345 is 120
```
which is the product of the digits 1 x 2 x 3 x 4 x 5.
notice that the number 123456789 is a 9-digit number consisting exactly the
数字123456789是一个9位数,正好是由1到9这9个数字组成的。这种数字被称为“连续数”或“全数字数”。它是一个“1到9全数字数”,意思是它包含了1到9这些数字,并且每个数字都只出现了一次。
这种类型的数字在数学中是很有趣的,因为它们在很多数学问题中都有特殊的性质。例如,它们可以被用来构建其他特殊的数字,或者用来解决一些数字逻辑问题。
在这个特定的例子中,我们可以看到123456789这个数字正好包含了1到9这些连续的数字,而且每个数字都只出现了一次。这种数字在数学游戏、数独等解密游戏中经常被使用,因为它们具有独特的特性。
总之,123456789这个9位数的特殊之处在于它是由1到9这些数字恰好组成的,没有多余的数字,也没有缺少的数字。这种数字给人一种整齐、有序的感觉,同时也展现了数字之间的特殊的关联。
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