Determining if batch script has been started/executed from the command line (cmd) -or- To pause or not to pause?

Question

I like to have a typical \"usage:\" line in my cmd.exe scripts — if a parameter is missing, user is given simple reminder of how the script is to be used.

Answer 1

:: exit if not interactive
echo %CMDCMDLINE% | find /i "/c"
if not ERRORLEVEL 1 goto:eof