We’ve seen that % (the remainder operator) can be used to test whether a number is even or odd by using % 2 to check whether it’s divisible by two. Here’s another way to define whether a positive whole number is even or odd

isEven.js

// Your code here.
function isEven(number){
	while (number > 0 || number < 0)
      	if (number > 0 && (isEven(number - 1) == 0))
      		return true;
  		else if(number < 0 && (isEven(number + 1) == 0))
          	return true;
        else
          	return false;
}
console.log(isEven(50));
// → true
console.log(isEven(-76));
// → false
console.log(isEven(-2));
// → ??