Info Catalog
as: PJ Syntax
9.34.2.1 Special Characters
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The presence of a '!' or '/' on a line indicates the start of a comment
that extends to the end of the current 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 could also be a
logical line number directive (
Comments) or a preprocessor
control command (Preprocessing).
The ';' character can be used to separate statements on the same
line.