2413. Smallest Even Multiple

/*
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.
*/
class Solution {
public:
    int smallestEvenMultiple(int n) {
        if(n%2==0){
            return n;
            
        }
       return smallestEvenMultiple(n*2);
    }
};