2413. Smallest Even Multiple

EasyLeetCode

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

How to solve the problem

Check the Given number is odd or even by n%2:

Even:Result : n Odd:Result : n*2

Code

class Solution:
    def smallestEvenMultiple(self, n: int) -> int:
        if n % 2 == 0:
            return n
        else:
            return 2 * n

Complexity

Time complexity: O(1)

Space complexity: O(1)