[Solved] Given an integer n, return true if it is a power of four. Otherwise, return false.

Question

Given an integer n, return true if it is a power of four. Otherwise, return false.

An integer n is a power of four, if there exists an integer x such that n == 4x.

Example 1:

Input: n = 16
Output: true

Example 2:

Input: n = 5
Output: false

Example 3:

Input: n = 1
Output: true

Constraints:

  • -231 <= n <= 231 - 1

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

Python Solution

class Solution:
    def isPowerOfFour(self, num: int) -> bool:
        if num<=0:
            return False
        while num%4==0:
            num = num/4
        return True if num==1 else 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.

Articles: 521

Leave a Reply

Your email address will not be published. Required fields are marked *