Up: RX-Syntax
The presence of a `;' appearing anywhere on a line indicates the start of a comment that extends to the end of that line.
If a `#' appears as the first character of a line then the whole line is treated as a comment, but in this case the line can also be a logical line number directive (see Comments) or a preprocessor control command (see Preprocessing).
The `!' character can be used to separate statements on the same line.