Hi, I have just started learning batch scripting.., I want to know why we use the below variables %%a,%%b,%%c,%%d,%%e,%%f,%%i like this we have so many variales..are these variables are used for any specific purpose? and what are these number variables for %%1 , %%2, %%3 ,%%4 ,%%5 ,%%6,%%7,%%8,%%9 Please let me know why and where are these variables used. Regards, Satyam

%%a, %%b etc are generally used in FOR loops, such as: for %%a in (*.*) do echo %%a You can use any letter you want, it doesn't matter. %1, %2 etc are used on the command line to specify optional arguments. Take for example this script: @echo off set filename=%0 set arg1=%1 set arg2=%2 echo %arg1% echo %arg2% echo This file is called %filename% save that as script.bat, then on the command line: script testARG1 testARG2 The following would be echo'd to STDOUT: testARG1 testARG2 This file is called script.bat You can get more info on the use of these variables with the following commands: for /? set /?