Power of Two - Math - Easy - LeetCode

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

Example 1:

Input: n = 1 Output: true Explanation: 20 = 1 Example 2:

Input: n = 16 Output: true Explanation: 24 = 16 Example 3:

Input: n = 3 Output: false Example 4:

Input: n = 4 Output: true Example 5:

Input: n = 5 Output: false

Constraints:

-231 <= n <= 231 - 1

public class Solution {
 public bool IsPowerOfTwo(int n) {
 if(n<=0){
 return false;
 }
 return ((n&(n-1))==0);
 }
}

Time Complexity: O(1)

Space Complexity: O(1)