'                        Comment

 ' [remark]

    Adds explanatory text to a program listing.

      remark    Commentary text, ignored by BASIC.

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      Notes:    BASIC does not execute comments, but a program may branch
                to a statement beginning with '.  Execution will then
                continue with the first executable statement thereafter.

                Any program statements following a comment, in the same
                logical line, are ignored by BASIC.

                ' can be used to add a comment at the end of an existing
                program statement (BASIC ignores everything following the
                ' character). Exception: ' cannot be used in this manner
                in a DATA statement (because BASIC would treat the ' as
                part of the DATA).