An example of an anonymous block. : Introduction « PL SQL Programming « Oracle PL/SQL Tutorial

1. Oracle PL/SQL Tutorial
2. PL SQL Programming
3. Introduction

DECLARE
  hundreds_counter  NUMBER(1,-2);
BEGIN
  hundreds_counter := 100;
  LOOP
    DBMS_OUTPUT.PUT_LINE(hundreds_counter);
     hundreds_counter := hundreds_counter + 100;
   END LOOP;
 EXCEPTION
 WHEN OTHERS THEN
   DBMS_OUTPUT.PUT_LINE('That is as high as you can go.');
END;
/