231. Power of Two (Easy)

https://leetcode.com/problems/power-of-two/

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

Example 1:

Input: 1
Output: true 
Explanation: 20 = 1

Example 2:

Input: 16
Output: true
Explanation: 24 = 16

Example 3:

Input: 218
Output: false

Hints

Solutions

class Solution {
    public boolean isPowerOfTwo(int n) {
        if (n <= 0) {
            return false;
        }

        return (n & (n - 1)) == 0 ? true : false;
    }
}
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