Concatenating inside for loop

Question

I am trying to create folders inside another folder using numbers. The code is below. Now I am checking with echo. But it is printing empty string.What is the mistake in it ? and how to achieve this?

    set folder=d:/delete_It
    setlocal ENABLEDELAYEDEXPANSION        
    FOR /L %%r IN (72,1,98) DO (
    REM mkdir %%r
    if not errorlevel 0 goto somethingbad
    set final_Dir=%folder%/%%r
    if not errorlevel 0 goto somethingbad
    echo final_Dir
    if not errorlevel 0 goto somethingbad
    )
    endlocal
    somethingbad:
        echo "Unexpected error" 

Note: I am using Windows 10 -pro, 64 bit

Answer 1

@echo off 

pushd "D:\delete_it"
setlocal EnableDelayedExpansion 

for /l %%r in (72 1 98)do mkdir %%r && (
       set "_final_dir=!cd!\%%~r"
       <con: echo\!_final_dir!
    ) || (
      echo\Unexpected error^!! & popd
      endlocal & goto :eof
    )

popd & endlocal | <con: echo\Good bye^^!!

You don't need to set a variable for your folder, just go to D:\Delete_it or use pushd and popd

You can replace all your if errorlevel to operators && ==> return 0 and || ==> return non 0

You can replace goto (and :label) to || (commands in block)