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Published: April 17, 2012

Updated: April 17, 2012

Applies To: Windows 7, Windows 8, Windows Server 2000, Windows Server 2003, Windows Server 2003 R2, Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Vista, Windows XP

Records comments (remarks) in a batch file or CONFIG.SYS. If no comment is specified, rem adds vertical spacing.

For examples of how to use this command, see Examples.

rem [<Comment>]


Parameter Description


Specifies a string of characters to include as a comment.


Displays help at the command prompt.

  • The rem command does not display comments on the screen. You must use the echo on command in your batch or CONFIG.SYS file to display comments on the screen.

  • You cannot use a redirection character (< or >) or pipe (|) in a batch file comment.

  • Although you can use rem without a comment to add vertical spacing to a batch file, you can also use blank lines. Blank lines are ignored when a batch program is processed.

The following example shows a batch file that uses remarks for comments and for vertical spacing:

@echo off
rem  This batch program formats and checks new disks.
rem  It is named Checknew.bat.
rem echo Insert new disk in Drive B.
format b: /v chkdsk b: 

To include an explanatory comment before the prompt command in your CONFIG.SYS file, add the following lines to CONFIG.SYS:

rem Set prompt to indicate current directory
prompt $p$g

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