! (comment)

Any characters following the character ! on the line are treated as comment by CL, and ignored.

IMPORTANT: characters in square brackets are interpreted by the pre-processor regardless of whether they appear in a comment. The *SKIP command should be used to comment out PP commands

The character for comments is set by format CPC, and may be changed from the standard, which is !.

NOTE: characters [ ] @ and % should not be used for comments (as these are reserved for positions and specials) and that the setting should not conflict with the settings of formats CDL, CDI, CDS, CDH and CDO.

Blank lines are allowed to separate blocks of code.