let myComment:="this is a comment"

Leo

"Define ID in variable";
let myId := Id;
"Get customer name";
let myCust := Customer;

Nick

Yes we need an easy comment function such as // instead of just assigning a meaningless variable as a workaround...

Apparently just the quotes are needed, the "let" and variable name is not needed. So, you can insert comments using this;

"---INSERT COMMENT HERE---";

Just be aware that with a quoted string not assigned to anything, you are not really creating a comment, you are specifiying a result value that may or not be used somewhere. For example, in a formula field, if the last line in the script is a "comment" in the form of an unassigned quoted string, then that will be the result of the formula.

It would also be interesting to know if there is a performance difference in assigning a quoted string to a variable or not assigning it. This would be especially interesting if the "comments" are in a loop with many iterations.

@Tim.. great observation ... I have used the  let c:= "my comment" ..     c:="new comment" ..  I have used them in loops... but never did any perf / load testing.