How to return result of an Oracle stored procedure to a shell script -

i have oracle procedure proc1 adds 2 values , gives result.i have call procedure shell , show result shell.i able call procedure shell,but shows pl/sql procedure completed.but result not coming shell .

i doing call procedure shell...

$  echo "execute proc1(10,10);"|sqlplus -s system/xxxxx@orcl 

this procedure running fine .

  create or replace procedure proc1  (n1 in number,n2 in number)  begin  dbms_output.put_line(n1+n2);  end;  / 

i need output in shell .anyone plese help.

i aware there answer showing how use set serveroutput on , procedure call on separate lines, writing answer one-liner same thing.

bascially need shove sqlplus:

set serveroutput on execute proc1(10,10); 

you might @ first think can done on 1 line, separated semi-colon.

set serveroutput on; execute proc1(10,10); 

however doesn't work - need newline character.

so trick use -e flag echo, can give newline \n.

using head -1 trims everyting line containing procedure result.

final one-line answer:

echo -e "set serveroutput on\n execute proc1(10,10);"|sqlplus -s system/xxxxx@orcl| head -1 

p.s. editted question remove password :)