Tandy 1000 MS-DOS Reference Manual page 179

i
L ;
SET
r
SET
[name
=
[string]]
I
Chapter 6 / Command Reference
Internal
Sets an environmental variable equal to a string.
Parameters
name is the environment variable to assign to, string. name
cannot be numeric.
string is the string you are naming in the environment. If you
omit the string parameter, SET removes the variable name from
the environment. string cannot be numeric.
If you omit all parameters, SET displays the current environ-
ment variables and their settings.
L
~
I :
r-,
l .
r
!"""
[
,
I'
l
I'
I
Notes and Suggestions
• This command is useful only in programs you have written.
• MS-DOS reserves a part of memory for environment variables.
If you use a name that already exists in the environment, SET
replaces the old value of name with the new string.
• You use SET to its greatest advantage if you have several
batch files that use the same string. For example, suppose you
have several batch files that contain %filename%. One might
contain the command:
type
7.filename7.IENTERI
Another might contain the command:
cop
y
a:
7. f i 1 e n
a m
e 7. b:
I
ENTER
I
Note:
Within the batch file commands, the string is
enclosed by percent signs. Within the SET com-
mand, it is not.
The first time you run all the batch files, you may want to
substitute Myfile for filename. To do this, use the SET com-
mand before you begin. Type:
set filename=myflle
I
ENTER
I
165