#326 - Power of Three

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Problem Description

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

An integer n is a power of three, if there exists an integer x such that n == 3x.

Solution

/**
 * @param {number} n
 * @return {boolean}
 */
var isPowerOfThree = function(n) {
  if (n > 1) {
    while (n % 3 === 0) {
      n /= 3
    }
  }
  return n === 1;
};