python 判断一个数字是否为3的幂

 

def is_Power_of_three(n):  
    while (n % 3 == 0):  
         n /= 3;           
    return n == 1;  
  
print(is_Power_of_three(9))  
print(is_Power_of_three(81))  
print(is_Power_of_three(21))

 

posted @ 2018-11-15 10:27  anobscureretreat  阅读(796)  评论(2)  编辑  收藏  举报