2413. Smallest Even Multiple

Easy
​
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

解題

Runtime: 0 ms, faster than 100%
Memory Usage: 1.9 MB, less than 14.7%
func smallestEvenMultiple(n int) int {
if n <= 2 { return 2 }
​
num := n
for {
if num % n == 0 && num % 2 == 0 { return num }
num++
}
​
return n
}