The value within the parenthesis is the implicit parameter and the item by itself will be the express parameter, solutions that do not have specific parameters, use implicit parameters, the fillTank technique has each an explicit and an implicit parameter. Allows get a closer think about the fillTank process in https://jav-this14702.activosblog.com/28270229/free-this-jav-things-to-know-before-you-buy