Used to include explanatory remarks in a program.
You can also use the following syntax:
If you use line numbers or line labels, you can branch from a GoTo or GoSub statement to a line containing a Rem statement. Execution continues with the first executable statement following the Rem statement. If the Rem keyword follows other statements on a line, it must be separated from the statements by a colon (:).
You can use an apostrophe (') instead of the Rem keyword. When you use an apostrophe, the colon is not required after other statements.