how to create a cursor to read through table rows

[sql]declare
  counter1 number := 0;
  counter2 number := 0;
  cursor cur_t is
    SELECT * from emp where e_name = 'Ptere'; --set cursor, a select statement
  rec_t emp%rowtype; --defines this is a row from the database

begin
  counter1 := 0;
  counter2 := 0; --some counters to log the records being changed
  open cur_t; --open cursor

  loop
    --begin loop
  
    fetch cur_t
      into rec_t; --fetches cursor row into the rec_t variable
  
    exit when cur_t%notfound;
    UPDATE emp SET e_name = 'Peter' where e_name = 'Ptere';
    counter1 := counter1 + 1; --increment updates
    insert into update_log
      (record_id, table_name, description) --useful for ref. purposes
    values
      (rec_t.emp_id, 'emp', 'Peter');
    counter2 := counter2 + 1; --increment inserts
    commit;
  end loop;
  --row_count := sql%rowcount; --sql counter for update statements
  dbms_output.put_line('EMP: ' || 'name changed, updated: ' || counter1);
  dbms_output.put_line('insert into UPDATE_LOG: ' || counter2);
  close cur_t; --close the cursor
end;
[/sql]

Note for DBMS output we need to set the command prompt:[sql]set serveroutput on size 1000000 [/sql]format wrapped