def is_Power_of_four(n): while n and not (n & 0b11): n >>= 2 return (n == 1) print(is_Power_of_four(4)) print(is_Power_of_four(12)) print(is_Power_of_four(16)) print(is_Power_of_four(255))
判断一个数是否是4的n次方
原文：https://www.cnblogs.com/sea-stream/p/10172470.html
