IF… OR IF… in a windows batch file

Question

Is there a way to write an IF OR IF conditional statement in a windows batch-file?

For example:

IF [%var%] == [1] OR IF [%var%] == [2] ECHO TRUE

Answer 1

A simple "FOR" can be used in a single line to use an "or" condition:

FOR %%a in (item1 item2 ...) DO IF {condition_involving_%%a} {execute_command}  

Applied to your case:

FOR %%a in (1 2) DO IF %var%==%%a ECHO TRUE