create or replace procedure p ( p out int ) as
begin
  p := 1;
end p;
/

var job_name varchar2(10);
exec :job_name := 'OUT_PROC';

begin
    dbms_scheduler.create_job (
      job_name => :job_name,
      job_type => 'PLSQL_BLOCK',
      job_action => 'declare
  val int;
begin 
  p ( val );
  dbms_output.put_line ( val ); 
end;',
      number_of_arguments => 0,
      enabled => false,
      auto_drop => false
    );

    dbms_scheduler.set_attribute( 
       name => :job_name, 
       attribute => 'store_output', value => TRUE
    );
    dbms_scheduler.enable (
      name => :job_name
    );
END;
/

create or replace procedure p ( p out int ) as
begin
  p := 0;
end p;
/

exec dbms_scheduler.run_job ( job_name => :job_name, use_current_session => false );

select job_name, status, output 
from   user_scheduler_job_run_details
where  job_name = :job_name
order  by log_date desc;

JOB_NAME    STATUS       OUTPUT   
OUT_PROC    SUCCEEDED    0         
OUT_PROC    SUCCEEDED    1

exec dbms_scheduler.drop_job ( :job_name );