rem comment=1
rem 'echo' is word=2, 'a' is default=0
echo a
rem label=3
:START
rem '@' is hide=4
@echo b
rem 'gcc' is external command=5
gcc --version
rem '%PATH%' is variable=6
echo %PATH%
echo %ProgramFiles(x86)%
rem operator=7 '='
@set Q=A

rem 2nd ')' in this construct is wrongly styled as default
if ERRORLEVEL 2 goto END
@if exist a (
echo exists
) else (
echo not
)

FOR /L %%G IN (2,1,4) DO (echo %%G)

:END