Windws command rem command

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Records comments in a script, batch, or config.sys file. If no comment is specified, rem adds vertical spacing.


This command is internal to the command-line interpreter, cmd.exe.


rem [<comment>]


Parameter Description
<comment> Specifies a string of characters to include as a comment.
/? Displays help at the command prompt.


  • The rem command doesn’t display comments on the screen. To display comments on the screen, you must include the echo on command in your file.
  • You can’t 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.


To add vertical spacing through batch file comments, type:

@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 a config.sys file, type:

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

To provide a comment about what a script does, type:

rem The commands in this script set up 3 drives.
rem The first drive is a primary partition and is
rem assigned the letter D. The second and third drives
rem are logical partitions, and are assigned letters
rem E and F.
create partition primary size=2048
assign d:
create partition extended
create partition logical size=2048
assign e:
create partition logical
assign f:

For multi-line comments, use conditional execution:

    The REM statement evaluates to success,
    so these lines will never be executed.
    Keep in mind that you will need to escape closing parentheses
    within multi-line comment blocks like shown in this example. ^)