Even Number Filter

Array

Given an array of integers, write a function that returns a new array containing only the even numbers from the original array.

Example 1

Input

[
  1,
  2,
  3,
  4,
  5
]

Output

[2, 4]

Explanation. Only 2 and 4 are even numbers from the input array [1, 2, 3, 4, 5].

Example 2

Input

[
  -2,
  -3,
  -4,
  0,
  10
]

Output

[-2, -4, 0, 10]

Explanation. The even numbers in this array are -2, -4, 0, and 10.

Example 3

Input

Output

[]

Explanation. There are no even numbers in the array [7, 13, 19, 23].

Follow-up: Can you solve this problem using a higher-order function (like `filter` in JavaScript or Python)? What would be the time complexity of your solution?

Constraints:

The input array may contain both positive and negative integers, including zero. The array will contain at least one integer.

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