The one from w3schools is for MySQL, you use PostgreSQL here. Look at PostgreSQL docs and you'll find it there.

For this case it won't make a difference since we do not have any block within the function.

thanks for this!

Thank you, I love these breaking-down-code comments under the best solutions !

Because nonzero is truthy and zero is falsy, so you could just use the number itself as the condition.

Hello! Could someone explain why you don't need to type out "=== 0"?

I think so!

I like this comment lol

very creative way of thinking!

Thanks!

very readable, object oriented, and concise +1

+1 very readable and digestible

+1 very readable and digestible