It is possible to add comments to parts of mathematical expressions. In this case, the comments must start with # and extend until the end of the line of the file or the expression.
Example ^if(
$age>=$MINIMUM_AGE # not too young
&& $age<=$MAXIMUM_AGE # and not too old
){
Suitable age }
Important notice: we do recommend you to add comments to parts of complex mathematical expressions. You yourself may find it difficult to understand in a while.