Power of Two

Given an integer, write a function to determine if it is a power of two.

判断一个integer是否为2的幂。

public class Solution {
    public static boolean isPowerOfTwo(int n) {
          double d = n;
          
          if(d==1){
              return true;
          }
            while(d>=2){
                d = d/2;
                if(d==1){
                    return true;
                }
            }
            return false;
        }
}

252 ms.