6.2 Visible comments

‘/* ... */’ is a long comment (it may extend over several lines).

‘// ...’ is a short comment (terminated by the next newline).

‘@(...@)’ is a meta-comment. Meta-comments are a localized form of the N mode (see Languages). Tangled meta-comments are begun by the contents of the style-file entry ‘meta.top’ and terminated by ‘meta.bottom’. Each line of the meta-comment is begun by ‘meta.prefix’. Woven meta-comments are begun by ‘meta_code.begin’ and ended by ‘meta_code.end’. See Miscellaneous params.

@n
@a
        program main
/* Get input. */
        call get_input // Read the parameter file.
/* Process information.  Comments like this
   can be split over several lines. */
@(
Meta-comments provide a poor-person's alignment feature
 i --- counter
 x --- data value
@)
        i = 1
        x = 2.0
        call exec(i,x)
        end

The use of meta-comments is not recommended; they are only marginally supported. Use ordinary long comments instead. Inside of them, use the various powerful features of TeX or LaTeX (such as \halign or \begin{verbatim} ... \end{verbatim}) to format your comment appropriately.