LeetCode——Power of Two

Description：

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

public class Solution {
    public boolean isPowerOfTwo(int n) {
        boolean flag = false;
        if(n == 0) return false;
        while(true) {
            if(n == 1) {
                flag = true;
                break;
            }
            if(n % 2 != 0) {
                flag = false;
                break;
            }
            else {
                n /= 2;
            }
        }
        return flag;
    }
}