Batch file browser demo

@ECHO OFF
REM Copyright (c) 2018 by /u/AyrA_ch
REM Example directory browser in batch file

REM Enable Support for "!" expansion
SETLOCAL ENABLEDELAYEDEXPANSION

REM Starting point
CD /D C:\

REM Lists all directories and files
:LOOP
CLS
ECHO Content of "%CD%"

REM Dirs
ECHO.
ECHO Directories:
SET COUNT=0
ECHO !COUNT!: ^<..^>
FOR /D %%I IN (*.*) DO (
SET /A COUNT=!COUNT!+1
SET DIR[!COUNT!]=%%I
ECHO !COUNT!: %%I
)

REM Files
ECHO.
ECHO Files:
FOR %%I IN (*.*) DO (
SET /A COUNT=!COUNT!+1
SET FILE[!COUNT!]=%%I
ECHO !COUNT!: %%I
)

REM Make Selection
ECHO.
SET /P SEL=Select [Q, 0-%COUNT%]:
REM Check for special selection
IF /I "%SEL%"=="Q" GOTO END
IF "%SEL%"=="0" GOTO UP
REM Check if file
IF NOT "!FILE[%SEL%]!"=="" GOTO EXEC
REM Check if Dir
IF NOT "!DIR[%SEL%]!"=="" GOTO LIST
REM Neither
GOTO CLEAR

REM Directory up
:UP
CD ..
GOTO CLEAR

REM Execute selection (is file)
:EXEC
START /D "%CD%" !FILE[%SEL%]!
REM use "CLEAR" to not exit this file
GOTO END

REM Navigate to selection
:LIST
CD "!DIR[%SEL%]!"
GOTO CLEAR

REM Clear set variables and show list
:CLEAR
FOR /L %%I IN (1,1,%COUNT%) DO (
SET FILE[%%I]=
SET DIR[%%I]=
)
GOTO LOOP

REM Exit
:END
REM This automatically clear up
ENDLOCAL