What does the %%a mean?
I understand the context but not how to use it.
For example :
FOR %%a in (%HELP%) DO echo I don't Know what it means
What does the %%a mean?
I understand the context but not how to use it.
For example :
FOR %%a in (%HELP%) DO echo I don't Know what it means
%%a
refers to the name of the variable your for loop will write to.
Quoted from for /?
:
FOR %variable IN (set) DO command [command-parameters]
%variable Specifies a single letter replaceable parameter.
(set) Specifies a set of one or more files. Wildcards may be used.
command Specifies the command to carry out for each file.
command-parameters
Specifies parameters or switches for the specified command.
To use the FOR command in a batch program, specify %%variable instead
of %variable. Variable names are case sensitive, so %i is different
from %I.
for %%a in (A B C D E) do Echo %%a
Produces
A
B
C
D
E
for %%a in (A B C) do (for %%b in (1 2 3) do Echo %%a:%%b)
Produces
A:1
A:2
A:3
B:1
B:2
B:3
C:1
C:2
C:3