231. Power of Two
Given an integer n
, return true
if it is a power of two. Otherwise, return false
.
An integer n
is a power of two, if there exists an integer x
such that n == 2x
.
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
# @lc code=start
using LeetCode
function is_power_of_two(n::Int)
return n > 0 && (n & (n - 1)) == 0
end
# @lc code=end
is_power_of_two (generic function with 1 method)
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