Return from subprogram. If M99 is called from main program, main program is restarted and will loop until stop.
M99
M98 P1000 M98 P2000 L3 M2 O1000 (print,This is subprocedure O1000) M99 O2000 (print,This is subprocedure O2000) M99
Output:
This is subprocedure O1000 This is subprocedure O2000 This is subprocedure O2000 This is subprocedure O2000