JavaScript: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: 15
Certainly! Here's a JavaScript function that checks if a PIN string is valid according to the given conditions:
```javascript
function validatePIN(pin) {
if (pin.length === 4 || pin.length === 6) {
if (/^\d+$/.test(pin)) {
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
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
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.
if digit == 2 and digit in digits:
这段代码是在判断玩家点击的是哪个按钮,具体来说:
- `if digit == 2` :如果玩家点击的是第2个按钮。
- `and digit in digits:` :并且这个按钮对应的数字在可用数字列表 `digits` 中。
- `digits.remove(digit)` :将这个数字从可用数字列表中移除,确保同一个数字不能被重复点击。