SET

Displays, sets, or removes MS-DOS environment variables.

You use environment variables to control the behavior of some batch files   
and programs and to control the way MS-DOS appears and works. The SET
command is often used in the AUTOEXEC.BAT or CONFIG.SYS files to set
environment variables each time you start MS-DOS.

Syntax

    SET variable=[string]

To display the current environment settings, use the following syntax:

    SET

Parameters

variable
    Specifies the variable you want to set or modify.

string
    Specifies the string you want to associate with the specified variable.

Related Commands

For information about setting environment variables that MS-DOS uses to
control its own operations, see the <PATH>, <PROMPT>, <SHELL>, and <DIR>
commands.