Single line comments are introduced by a pound character (#, sometimes called a hash, sharp, or number sign character). This character and all that follow it on a line comprise a comment, and are discarded by Maple.

If the pound character is enclosed within a pair of left single quotes (a symbol) or double quotes (a string), then it is not treated as the beginning of a comment.

If the final character of a comment line is a non-escaped backslash, the comment is continued on the next line.

Multiline comments are enclosed in (* and *). Multiline comments are not available in 2-D math.

Maple procedures and modules may also contain a description clause, which is similar to a comment in that its purpose is documentation. However, unlike # comments, the description clause is retained by Maple when the procedure is compiled into Maple's internal form and will be displayed when the procedure is printed.

p := proc(x) description "Descriptions are retained by Maple.";
    # Square x.
    x^2; # Comments are discarded by Maple.
end proc;