Create a procedure of calculator - DBMS (Procedure)

create or replace procedure cal(no1 in number,no2 in number,symbol in varchar2)

is ans  number;

begin

if symbol='+'

then

ans:=no1+no2;

elsif symbol='-'

then

ans:=no1-no2;

elsif symbol='*'

then

ans:=no1*no2;

elsif symbol='/'

then

ans:=no1/no2;          

end if;

dbms_output.put_line('The Answer is :'||ans);

end;