Stored Procedure error in POSTGRESQL PGADMIN4

Question

I am getting the below error when I try to create either a stored procedure or a stored function in PGADMIN4. How can I fix it:

ERROR: syntax error at or near "procedure"

LINE 1: create or replace procedure transfer(

The code to create the tables:

drop table if exists accounts;
create table accounts (
    id int generated by default as identity,
    name varchar(100) not null,
    balance dec(15,2) not null,
    primary key(id)
);
insert into accounts(name,balance) values('Bob',10000);
insert into accounts(name,balance) values('Alice',10000);

Error is received after I add the below stored procedure:

create or replace procedure transfer(
   sender int,
   receiver int, 
   amount dec
)
language plpgsql    
as $$
begin
    -- subtracting the amount from the sender's account 
    update accounts 
    set balance = balance - amount 
    where id = sender;

    -- adding the amount to the receiver's account
    update accounts 
    set balance = balance + amount 
    where id = receiver;

    commit;
end;$$

Answer 1

Procedures are available in Postgres starting version 11 only, while you tagged your question with version 9.4.

In earlier versions, you can use a void function instead. Basically, replace:

create or replace procedure transfer(sender int, receiver int, amount dec)
language plpgsql    
as $$
begin
    ...
end; $$

With:

create or replace function transfer(sender int, receiver int, amount dec)
returns void
language plpgsql    
as $$
begin
    ...
end; $$