How to check command line parameter in “.bat” file?

Question

My OS is Windows Vista. I need to have a \".bat\" file where I need to check if user enters any command-line parameter or not. If does then if the parameter equals to

Answer 1

You need to check for the parameter being blank: if "%~1"=="" goto blank

Once you've done that, then do an if/else switch on -b: if "%~1"=="-b" (goto specific) else goto unknown

Surrounding the parameters with quotes makes checking for things like blank/empty/missing parameters easier. "~" ensures double quotes are stripped if they were on the command line argument.