create procedure keyword won't work - plsql

Question

if i write procedure creating code like this
declare
salary number :=20000;
employee_id number :=36325;
procedure give_bonus(emp_id in number,bonus in number) is
begin
dbms_output.put_line(emp_id);
dbms_output.put_line(bonus);
end;
begin
case
when salary >=10000 and salary <=20000 then
give_bonus(employee_id,1500);
when salary >= 20000 and salary <=40000 then
give_bonus(employee_id,1000);
when salary>40000 then
give_bonus(employee_id,500);
else
give_bonus(employee_id,0);
end case ;
end;
it writes on output
anonymous block completed
but if i write a head of procedure word this one
create or replace procedure give_bonus ,it writes errors,please help me why?
error is this
Error starting at line 1 in command:
declare
salary number :=20000;
employee_id number :=36325;
create or replace procedure give_bonus(emp_id in number,bonus in number) is
begin
dbms_output.put_line(emp_id);
dbms_output.put_line(bonus);
end;
begin
case
when salary >=10000 and salary <=20000 then
give_bonus(employee_id,1500);
when salary >= 20000 and salary <=40000 then
give_bonus(employee_id,1000);
when salary>40000 then
give_bonus(employee_id,500);
else
give_bonus(employee_id,0);
end case ;
end;
Error report:
ORA-06550: line 4, column 3:
PLS-00103: Encountered the symbol "CREATE" when expecting one of the following:
begin function pragma procedure subtype type <an identifier>
<a double-quoted delimited-identifier> current cursor delete
exists prior
06550. 00000 - "line %s, column %s:\n%s"
*Cause: Usually a PL/SQL compilation error.
*Action:

Answer 1

CREATE OR REPLACE only works for top-level objects. If you are declaring a procedure inside of another PL/SQL block, there is, by definition, nothing to replace. You aren't creating a procedure that will exist once the anonymous block finishes so there is nothing to replace. You're simply declaring a procedure that has the same scope as a local variable.
You could create a standalone procedure
create or replace procedure give_bonus(emp_id in number,bonus in number)
is
begin
dbms_output.put_line(emp_id);
dbms_output.put_line(bonus);
end;
and then reference that procedure in your anonymous PL/SQL block
declare
salary number :=20000;
employee_id number :=36325;
begin
case
when salary >=10000 and salary <=20000 then
give_bonus(employee_id,1500);
when salary >= 20000 and salary <=40000 then
give_bonus(employee_id,1000);
when salary>40000 then
give_bonus(employee_id,500);
else
give_bonus(employee_id,0);
end case ;
end;