EXIT — Exit the program with status. ¶EXIT causes immediate termination of the program with status.  If status
is omitted it returns the canonical success for the system.  All Fortran
I/O units are closed. 
GNU extension
Subroutine
CALL EXIT([STATUS])
| STATUS | Shall be an INTEGERof the default kind. | 
STATUS is passed to the parent process on exit.
program test_exit integer :: STATUS = 0 print *, 'This program is going to exit.' call EXIT(STATUS) end program test_exit
ABORT — Abort the program, 
KILL — Send a signal to a process