How do you suppress environment variable expansion within DOS and Windows CMD?

Question

This is a simplified example with modified variable names of what I want to do. Also for simplicity sake, I am showing the command line version rather than the bat file ver

Answer 1

Within a batch file, use two %%s, e.g.:

set foo=1
echo %%foo%%

...echoes "%foo%", not "1". I'm not aware of a way to disable it in immediate mode (e.g., not in a batch file).

Answer 2

in a batch file, echo %%foo%% will generate %foo%.

c:\01Temp>type foo.bat
@echo %%foo%%

c:\01Temp>foo
%foo%

c:\01Temp>