Leetcode题解 231. Power of Two

Given an integer, write a function to determine if it is a power of two.
没啥说的，很简单的题。

public static boolean isPowerOfTwo(int n) {
        if (n == 1) {
            return true;
        } else if (n <= 0) {
            return false;
        } else {
            while (n > 0) {
                if (n == 1) {
                    return true;
                }
                if (n % 2 == 1) {
                    return false;
                }
                n /= 2;
            }
            return false;
        }
    }