Batch file to get parent directory without need of intermediate environment variables (so no need for setlocal as it is a one-liner)

ShowParentDirectory.bat

  echo batchfile=%0
  echo full=%~f0
setlocal
  for %%d in (%~dp0.) do set Directory=%%~fd
  echo Directory=%Directory%
  for %%d in (%~dp0..) do set ParentDirectory=%%~fd
  echo ParentDirectory=%ParentDirectory%
endlocal

I perform this,

for %%I in (.) do set CurrDirName=%%~nxI
for %%I in (..) do set ParentDirName=%%~nxI