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
}