Check if label exists cmd

Question

I wonder is there any way to check that if a label exist in a batch file?

If %input%=ABC (  
  If Label ABC Exists (
    Goto ABC
  )
)

How

Answer 1

Try the following code:

echo off
set "label=sub"
REM next line to reset errorlevel to zero:
(call )
call :%label% 2>nul || (echo %label% not found & exit /b 1) 
echo back from %label%
Exit /b 0

:sab
echo here we are