see HELP FOR and see the examples

or quick try this

 for /F %%a in ("AAA BBB CCC DDD EEE FFF") do echo %%a

Three possible solutions to iterate through the words of the string:

Version 1:

@echo off & setlocal
set s=AAA BBB CCC DDD EEE FFF
for %%a in (%s%) do echo %%a

Version 2:

@echo off & setlocal
set s=AAA BBB CCC DDD EEE FFF
set t=%s%
:loop
for /f "tokens=1*" %%a in ("%t%") do (
   echo %%a
   set t=%%b
   )
if defined t goto :loop

Version 3:

@echo off & setlocal
set s=AAA BBB CCC DDD EEE FFF
call :sub1 %s%
exit /b
:sub1
if "%1"=="" exit /b
echo %1
shift
goto :sub1

Version 1 does not work when the string contains wildcard characters like * or ? .

Versions 1 and 3 treat characters like = , ; or , as word separators. These characters have the same effect as the space character.

This is the only code that worked for me:

for /f "tokens=4" %%G IN ("aaa bbb ccc ddd eee fff") DO echo %%G 

output:

ddd

The following code will split a string with an arbitrary number of substrings:

@echo off
setlocal ENABLEDELAYEDEXPANSION

REM Set a string with an arbitrary number of substrings separated by semi colons
set teststring=The;rain;in;spain

REM Do something with each substring
:stringLOOP
    REM Stop when the string is empty
    if "!teststring!" EQU "" goto END

    for /f "delims=;" %%a in ("!teststring!") do set substring=%%a

        REM Do something with the substring - 
        REM we just echo it for the purposes of demo
        echo !substring!

REM Now strip off the leading substring
:striploop
    set stripchar=!teststring:~0,1!
    set teststring=!teststring:~1!

    if "!teststring!" EQU "" goto stringloop

    if "!stripchar!" NEQ ";" goto striploop

    goto stringloop
)

:END
endlocal

If someone need to split a string with any delimiter and store values in separate variables, here is the script I built,

FOR /F "tokens=1,2 delims=x" %i in ("1920x1080") do (
  set w=%i
  set h=%j
)
echo %w%
echo %h%

Explanation: tokens defines what elements you need to pass to the body of FOR, with token delimited by character x . So after delimiting, the first and second token are passed to the body. In the body %i refers to first token and %j refers to second token. We can take %k to refer to 3rd token and so on..

Please also type HELP FOR in cmd to get a detailed explanation.

easy

batch file:

FOR %%A IN (1 2 3) DO ECHO %%A

command line:

FOR %A IN (1 2 3) DO ECHO %A

output:

1
2
3

I ended up with the following:

set input=AAA BBB CCC DDD EEE FFF
set nth=4
for /F "tokens=%nth% delims= " %%a in ("%input%") do set nthstring=%%a
echo %nthstring%

With this you can parameterize the input and index. Make sure to put this code in a bat file.

The following code will split a string with N number of substrings with # separated values. You can use any delimiter

@echo off
if "%1" == "" goto error1

set _myvar="%1"

:FORLOOP
For /F "tokens=1* delims=#" %%A IN (%_myvar%) DO (
    echo %%A
    set _myvar="%%B"
    if NOT "%_myvar%"=="" goto FORLOOP
)

goto endofprogram
:error1
echo You must provide Argument with # separated

goto endofprogram
:endofprogram

or Powershell for a 0 indexed array.

PS C:> "AAA BBB CCC DDD EEE FFF".Split()
AAA
BBB
CCC
DDD
EEE
FFF

PS C:> ("AAA BBB CCC DDD EEE FFF".Split())[0]
AAA

set a=AAA BBB CCC DDD EEE FFF
set a=%a:~6,1%

This code finds the 5th character in the string. If I wanted to find the 9th string, I would replace the 6 with 10 (add one).

@echo off

:: read a file line by line
for /F  %%i in ( type data.csv ) do (
    echo %%i
    :: and we extract four tokens, ; is the delimiter.
    for /f "tokens=1,2,3,4 delims=;" %%a in ("%%i") do (
        set first=%%a&set second=%%b&set third=%%c&set fourth=%%d
        echo %first% and %second% and %third% and %fourth% 
    )
)

Here is a solution based on a "function" which processes each character until it finds the delimiter character.

It is relatively slow, but it is at least not a brain teaser (except for the function part).

:: Example #1:
set data=aa bb cc
echo Splitting off from "%data%":
call :split_once "%data%" " " "left" "right"
echo Split off: %left%
echo Remaining: %right%
echo.

:: Example #2:
echo List of paths in PATH env var:
set paths=%PATH%
:loop
    call :split_once "%paths%" ";" "left" "paths"
    if "%left%" equ "" goto loop_end
    echo %left%
goto loop
:loop_end



:: HERE BE FUNCTIONS
goto :eof

:: USAGE:
::   call :split_once "string to split once" "delimiter_char" "left_var" "right_var"
:split_once
    setlocal
    set right=%~1
    set delimiter_char=%~2
    set left=

    if "%right%" equ "" goto split_once_done

    :split_once_loop
        if "%right:~0,1%" equ "%delimiter_char%" set right=%right:~1%&& goto split_once_done
        if "%right:~0,1%" neq "%delimiter_char%" set left=%left%%right:~0,1%
        if "%right:~0,1%" neq "%delimiter_char%" set right=%right:~1%
        if "%right%" equ "" goto split_once_done
    goto split_once_loop

    :split_once_done
    endlocal & set %~3=%left%& set %~4=%right%
goto:eof

you can use vbscript instead of batch(cmd.exe)

Set objFS = CreateObject("Scripting.FileSystemObject")
Set objArgs = WScript.Arguments
str1 = objArgs(0)
s=Split(str1," ")
For i=LBound(s) To UBound(s)
    WScript.Echo s(i)
    WScript.Echo s(9)   get the 10th element
Next

usage:

c:	est> cscript /nologo test.vbs "AAA BBB CCC"

UPDATE: Well, initially I posted the solution to a more difficult problem, to get a complete split of any string with any delimiter (just changing delims). I read more the accepted solutions than what the OP wanted, sorry. I think this time I comply with the original requirements:

 @echo off
 IF [%1] EQU [] echo get n ["user_string"] & goto :eof
 set token=%1
 set /a "token+=1"
 set string=
 IF [%2] NEQ [] set string=%2
 IF [%2] EQU [] set string="AAA BBB CCC DDD EEE FFF"
 FOR /F "tokens=%TOKEN%" %%G IN (%string%) DO echo %%~G

An other version with a better user interface:

 @echo off
 IF [%1] EQU [] echo USAGE: get ["user_string"] n & goto :eof
 IF [%2] NEQ [] set string=%1 & set token=%2 & goto update_token
 set string="AAA BBB CCC DDD EEE FFF"
 set token=%1
 :update_token
 set /a "token+=1"
 FOR /F "tokens=%TOKEN%" %%G IN (%string%) DO echo %%~G

Output examples:

E:utilsat>get
USAGE: get ["user_string"] n
E:utilsat>get 5
FFF
E:utilsat>get 6
E:utilsat>get "Hello World" 1
World

This is a batch file to split the directories of the path:

@echo off
set string="%PATH%"
:loop
FOR /F "tokens=1* delims=;" %%G IN (%string%) DO (
    for /f "tokens=*" %%g in ("%%G") do echo %%g
    set string="%%H"
    )
if %string% NEQ "" goto :loop

2nd version:

@echo off
set string="%PATH%"
:loop 
FOR /F "tokens=1* delims=;" %%G IN (%string%) DO set line="%%G" & echo %line:"=% & set string="%%H"
if %string% NEQ "" goto :loop

3rd version:

@echo off
set string="%PATH%"
:loop
FOR /F "tokens=1* delims=;" %%G IN (%string%) DO CALL :sub "%%G" "%%H"
if %string% NEQ "" goto :loop
goto :eof

:sub
set line=%1
echo %line:"=%
set string=%2

This works for me (just an extract from my whole script)

choice /C 1234567H /M "Select an option or ctrl+C to cancel"
set _dpi=%ERRORLEVEL%

if "%_dpi%" == "8" call :helpme && goto menu 

for /F "tokens=%_dpi%,*" %%1 in ("032 060 064 096 0C8 0FA 12C") do set _dpi=%%1
echo _dpi:%_dpi%:

one more variation - this looks for the program "cmd.exe" in the current path and reports the first match:

@echo off
setlocal
setlocal enableextensions
setlocal enabledelayedexpansion

set P=%PATH%
:pathloop
for /F "delims=; tokens=1*" %%f in ("!P!") do (
    set F=%%f
    if exist %%fcmd.exe goto found
    set P=%%g
)
if defined P goto pathloop

echo path of cmd.exe was not found!
goto end

:found
echo found cmd.exe at %F%
goto end

:end