proper syntax for scalar udf functions in sql code example

Example 1: functions with parameters SQL

DECLARE
	@OrderID int = NULL,
	@OrderType int = 1,
	@Qty int = 2,
	@ServiceSpeed int = 3;

INSERT INTO OrdersTest (OrderType, Qty, ServiceSpeed)
	VALUES (@OrderType, @Qty, @ServiceSpeed);

EXEC @OrderID = dbo.GetOrderID
	@OrderType = @OrderType,
	@Qty = @Qty,
	@ServiceSpeed = @ServiceSpeed;

SELECT @OrderID 'Using EXEC Syntax';

Example 2: functions with parameters SQL

EXEC @OrderID = dbo.GetOrderID
	@OrderType = @OrderType,
	@ServiceSpeed = @Qty,
	@Qty = @ServiceSpeed;