Math.ceil(): how many whole packs are needed

Useful to know

Math.ceil() returns the smallest integer that is not less than the input. If conditionally needed 23 items, and the box fits 10, Math.ceil(23 / 10) gives 3 boxes . [1]

The example allows for the same capacity and does not include a reserve or damaged items. In negative numbers "up" also follows the number axis : Math.ceil(-2.8) is -2. Therefore, first check whether the input represents an acceptable positive quantity. The method rounds but does not validate the logic of the order.