For Loop

--Write a PL_SQL block to insert numbers into student table
 Using For Loop
First You need to create table student.
sql> create table student(results number);

Example :-
Insert the numbers 1..10 excludining 5

BEGIN
FOR i in 1..10 LOOP
  IF i = 5  THEN
    null;
  ELSE
    INSERT INTO  student(results)
    VALUES (i);
 END IF;
END LOOP;
 COMMIT;
END;

To see the output Execute a  PLSQL statement
to check  that your PLSQL BLock Worked.

Select * from temp;