[Solved] 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.

Question

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

Constraints:

  • -231 <= n <= 231 - 1

 Follow up: Could you solve it without loops/recursion?

Python Solution

class Solution:
    def isPowerOfTwo(self, n: int) -> bool:
        if n<=0:
            return False
        while n>0:
            if n==1:
                return True
            elif n%2==0:
                n/=2
            else:
                return False
Abhishek Sharma
Abhishek Sharma

Started my Data Science journey in my 2nd year of college and since then continuously into it because of the magical powers of ML and continuously doing projects in almost every domain of AI like ML, DL, CV, NLP.

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