2413. Smallest Even Multiple

Problem

Given a positive integer n, return **the smallest positive integer that is a multiple of *both* 2 and **n.   Example 1:

Input: n = 5
Output: 10
Explanation: The smallest multiple of both 5 and 2 is 10.

Example 2:

Input: n = 6
Output: 6
Explanation: The smallest multiple of both 6 and 2 is 6. Note that a number is a multiple of itself.

  Constraints:

• 1 <= n <= 150

Solution

/**
 * @param {number} n
 * @return {number}
 */
var smallestEvenMultiple = function(n) {
    return n % 2 === 0 ? n : n * 2;
};

Explain:

nope.

Complexity:

• Time complexity : O(n).
• Space complexity : O(n).