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 (Java)

class Solution {
    public int smallestEvenMultiple(int n) {
        int k=2*n;
        for(int i=2*n;i>=n;i--)
        {
            if(i%n==0&&i%2==0)
                k=i;
        }
        return k;
    }
}

Explain:

nope.

Complexity:

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