PL/SQL Control Statements, Oracle

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--Oracle 11g Express Edition
--please drop objects you've created at the end of the script 
--or check for their existance before creating
--'\\' is a delimiter

-- Example of PL/SQL If,

DECLARE  
       a number(3) := 500; 
       grade char(1) := 'B';  
       i number := 1;
       VAR1 number := 100;  
       VAR2 number := 1; 
       j integer := 1; 
       var_11 number;
       
    BEGIN

var_11 :=10;
               
       dbms_output.put_line(' -------- IF ------------');
       IF( a < 20 ) THEN  
          dbms_output.put_line('a is less than 20 ' );  
       ELSE  
          dbms_output.put_line('a is not less than 20 ' );  
       END IF;  
       dbms_output.put_line('value of a is : ' || a);  
       
       
       dbms_output.put_line(' -------- CASE ------------');
       CASE grade  
       WHEN 'A' THEN dbms_output.put_line('Excellent');  
       WHEN 'B' THEN dbms_output.put_line('Very good');  
       WHEN 'C' THEN dbms_output.put_line('Good');  
       WHEN 'D' THEN dbms_output.put_line('Average');  
       WHEN 'F' THEN dbms_output.put_line('Passed with Grace');  
       ELSE dbms_output.put_line('Failed');  
       END CASE;  
   
       dbms_output.put_line(' -------- EXIT Loop ------------');
       
       LOOP  
       EXIT WHEN i>10;  
       dbms_output.put_line(i);  
       i := i+1;  
       END LOOP; 
       
       
       dbms_output.put_line(' -------- other loop ------------');
                
       LOOP  
       dbms_output.put_line(VAR1*VAR2);  
           IF (VAR2=10) THEN  
           EXIT;  
           END IF;  
       VAR2:=VAR2+1;        
       END LOOP;  
       
       dbms_output.put_line(' -------- while------------');
       
       WHILE j<=10 
       LOOP
       dbms_output.put_line(j);
       j := j+1;
       END LOOP;
       
       dbms_output.put_line(' --------  for loop  ---------');
       
       FOR var_12 IN 1 .. 11
       LOOP
       dbms_output.put_line(var_11 * var_12);
       END LOOP;
       
       dbms_output.put_line(' -------  for reverse  --------');
       
       FOR  var_13 IN REVERSE 1 .. 11
       LOOP
       dbms_output.put_line(var_11 + var_13);
       END LOOP;
       
       dbms_output.put_line(' ------- **** ---------');
       
    END;  
    
    
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