A for loop can also count backwards, so long as we can define the right conditions.

In order to count backwards by twos, we'll need to change our initialization, condition, and final-expression.

We'll start at i = 10 and loop while i > 0. We'll decrement i by 2 each loop with i -= 2.

var ourArray = [];

for(var i = 10; i > 0; i -= 2) {

  ourArray.push(i);

}

ourArray will now contain [10,8,6,4,2]