CANCEL - Terminate batch file processing

 Purpose:    Terminate batch file processing. 
             
 Format:     CANCEL [value ] 
             
             value :  The  numeric exit code to return to CMD.EXE. 
 

 See also:  CALL and QUIT. 

 Usage 

 The CANCEL command ends all batch file processing, regardless of the 
 batch file nesting level.  Use QUIT to end a nested batch file and return 
 to the previous batch file. 

 You can CANCEL at any point in a batch file.  If CANCEL is used from 
 within an alias it will end execution of both the alias and any batch 
 files which are running at the time. 

 The following batch file fragment compares an input line to "end" and 
 terminates all batch file processing if it matches: 

 
         input Enter your choice:  %%option
         if "%option" == "end" cancel
 

 If you specify a value, CANCEL will set the ERRORLEVEL or exit code to 
 that value (see the IF command, and the %? variable).