QUESTION:
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
EXPLANATION:
这道题目就比较简单了. 如果能整除2, 那么就是当前n, 如果不能就需要*2就行.
SOLUTION:
class Solution {
func smallestEvenMultiple(_ n: Int) -> Int {
if n % 2 == 0 {
return n
} else {
return n * 2
}
}
}