Power of Four - The Coding Shala

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 In this post, we will learn how to find if the Given number is Power of Four or not, and will implement its solution in Java.

Power of Four Problem

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 == 4^x.

Example 1:
Input: n = 16
Output: true

Example 2:
Input: n = 5
Output: false

Example 3:
Input: n = 1
Output: true

Power of Four Java Solution

Approach 1

Using Bit Manipulation.

Java Program: 

class Solution {
    public boolean isPowerOfFour(int n) {
        if(n == 0) return false;
        for(int i=0; i<32; i=i+2) {
            if((n | (1 << i)) == (1 << i)) return true;
        }
        return false;
    }
}


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