The worth inside the parenthesis is the implicit parameter and the item alone would be the express parameter, techniques that do not have express parameters, use implicit parameters, the fillTank approach has both of those an explicit and an implicit parameter. Allows get a better look at the fillTank strategy https://erickayuql.theideasblog.com/29287008/the-single-best-strategy-to-use-for-this-jav