Editing Reduce (computer algebra system) (section)

=== Comments ===
REDUCE has three comment conventions. It inherits the ''comment statement'' from ALGOL 60, which looks like this:
 comment This is a multi-line comment
         that ends at the next separator,
         so it cannot contain separators;
Comment statements mostly appear in older code.

It inherits the <code>%</code>... comment from Standard Lisp, which looks like this:
 % This is a single-line comment that ends at the end of the line.
 % It can appear on a line after code and
 % can contain the separators ";" and "$".
<code>%</code>... comments are analogous to [[C++]] <code>//</code>... comments and are the most commonly used form of comment.

REDUCE also supports a [[C (programming language)|C]]-style <code>/*</code>...<code>*/</code> comment that looks like this:
 /* This is a multi-line comment that can
    appear anywhere a space could and
    can contain the separators ";" and "$".
  */