Comment statements are not assembled as part of the object module, but are only printed in the assembly listing. You can write as many comment statements as you need, provided you follow these rules:

• Comment statements require an asterisk in the begin column. Internal macro definition comment statements require a period in the begin column, followed by an asterisk. Internal macro comments are accepted as comment statements in open code.
• Any characters of the EBCDIC character set, or double-byte character set can be used (see Character set).
• Comment statements must lie within the statement field. If the comment extends into the continuation-indicator field, the statement following the comment statement is considered a continuation line of that comment statement.
• Comment statements must not appear between an instruction statement and its continuation lines.