题目 #

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:

• $1 \le n \le 150$

思路1 数学思想 #

分析 #

• 就是一道数学题，奇数乘以2，偶数就是本身

代码实现 #

1func smallestEvenMultiple(n int) int {
2	if n % 2 == 0 {
3		return n
4	}
5	return 2 * n
6}