231. Power of Two

Easy

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 == 2 ** x.

class Solution:
    def isPowerOfTwo(self, n: int) -> bool:
        if n <= 0:
            return False

        return format(n, "b").count("1") == 1