====== GOSUB ... RETURN ======

Syntax:

  gosub <label>
  return

The ''GOSUB'' command calls a subroutine marked by a label. ''RETURN'' will pass control back to the caller. Nesting subroutines are supported (''GOSUB'' and ''RETURN'' compiles to just plain ''JSR'' and ''RTS'', nothing fancy). Stack overflow is not checked in runtime, but is quite unlikely to encounter. Example:

	rem ** subroutines **
	gosub first_routine
	end
	
	first_routine:
		print "hello world"
		gosub second_routine
		return
		
	second_routine:
		print "and hello again"
		return

**Note #1**: make sure to use the ''[[END|END]]'' command before your routines if you don't want them to be executed in the normal program flow (like in the example above).

**Note #2**: there is no runtime call stack checking (e. g. no ''?RETURN WITHOUT GOSUB ERROR''). If your call stack is corrupted, the program is likely to break.

**Note #3**: Unlike procedures, subroutines do not open a new local scope.