Comments can be useful for documenting the various formulas you create in Crystal Reports. Additionally, if you want to prevent one or more lines of a formula from being executed, but you don’t want to delete or cut them (for example, if you want to test the effect of not running part of the code), simply make them into comments.
To create a comment in Crystal syntax, type two forward slashes in front of the line. In Basic syntax, type a single-quote character in front of the line if you are using Basic syntax.
Either way, the code will be treated as comments and will not be executed.