DB2 - finding SUM of salaries of employees with out using SUM function

In DB2, we can create ananymous blocks to write PL SQL code..

The following is the code snippet to sum up the salaries with out using SUM inbuilt function...

BEGIN
	DECLARE V_SUM DECIMAL (10, 2) DEFAULT 0.0;
	FOR I AS SELECT SALARY FROM EMPLOYEES
	DO
		SET V_SUM = V_SUM + I.SALARY;
	END FOR;
END@