[Leetcode] Power of three

[lpatmo]

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

Example 1:

Input: 27 Output: true Example 2:

Input: 0 Output: false Example 3:

Input: 9 Output: true Example 4:

Input: 45 Output: false

[lpatmo]

var isPowerOfThree = function(n) {
    if (n < 1) {
        return false;
    }
    while (n > 1) {
        if (n % 3 !== 0) {
            return false;
        }
         n = n/3;

    }
    return true;
};