Is it even?

Problem

Write a function that takes a whole number and returns true if it's even and false if it isn't. Watch out for negative numbers.

Examples

• 4 → true

• 7 → false

• 0 → true

Besides these, the challenge has hidden tests that are revealed when you submit your solution.

You start with this

def is_even(n):
    pass

function isEven(n) {
}