Power of Three

Source

• leetcode: Power of Three

Given an integer, write a function to determine if it is a power of three.

Follow up:
Could you do it without using any loop / recursion?

java

public class Solution {
    public boolean isPowerOfThree(int n) {
        return n == 0 ? false : n == Math.pow(3, Math.round(Math.log(n) / Math.log(3)));
    }
}