dynamic row count per table

declare
sql_stmt varchar2(254);row_count number;
cursor get_tab is select table_name, num_rows from dba_tables where owner=upper('&&1');
begin
dbms_output.put_line('Checking Record Counts for schema &&1 ');dbms_output.put_line('Log file to numrows_&&1.lst ....');dbms_output.put_line('....');
FOR get_tab_rec IN get_tab LOOP
BEGIN
sql_stmt := 'select count(*) col1 from &&1.'get_tab_rec.table_name; EXECUTE IMMEDIATE sql_stmt INTO row_count;
dbms_output.put_line('Table 'rpad(get_tab_rec.table_name,30) ' 'TO_CHAR(row_count)' rows (Analyze 'get_tab_rec.num_rows' rows).');
EXCEPTION WHEN OTHERS THEN dbms_output.put_line('Error counting rows for table ' get_tab_rec.table_name);
END;
END LOOP;
END;