PL/SQL For Loop

PL/SQL for loop for beginners and professionals with examples on cursors, triggers, functions, procedures, strings, exceptions, arrays, collections, packages, transactions etc.

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PL/SQL FOR Loop

PL/SQL for loop is used when when you want to execute a set of statements for a predetermined number of times. The loop is iterated between the start and end integer values. The counter is always incremented by 1 and once the counter reaches the value of end integer, the loop ends.

Syntax of for loop:

FOR counter IN initial_value .. final_value LOOP
  LOOP statements; 
END LOOP;

initial_value : Start integer value
final_value : End integer value

PL/SQL For Loop Example 1

Let's see a simple example of PL/SQL FOR loop.

BEGIN
FOR k IN 1..10 LOOP
-- note that k was not declared
DBMS_OUTPUT.PUT_LINE(k);
END LOOP;
END;

After the execution of the above code, you will get the following result:

Note: You must follow these steps while using PL/SQL WHILE Loop.

You don't need to declare the counter variable explicitly because it is declared implicitly in the declaration section.
The counter variable is incremented by 1 and does not need to be incremented explicitly.
You can use EXIT WHEN statements and EXIT statements in FOR Loops but it is not done often.

PL/SQL For Loop Example 2

DECLARE 
VAR1 NUMBER;
BEGIN 
VAR1:=10;
FOR VAR2 IN 1..10
LOOP
DBMS_OUTPUT.PUT_LINE (VAR1*VAR2);
END LOOP;
END;

Output:

PL/SQL For Loop REVERSE Example 3

Let's see an example of PL/SQL for loop where we are using REVERSE keyword.

DECLARE 
VAR1 NUMBER;
BEGIN 
VAR1:=10;
FOR VAR2 IN REVERSE 1..10
LOOP
DBMS_OUTPUT.PUT_LINE (VAR1*VAR2);
END LOOP;
END;

Output:

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