Of the abstraction. The values for getRadius() or getCircumference() in the above mentioned instance could be stored specifically, or they could be calculated, it won't matter to your caller; the setters may or may not have side effects; it won't make a difference for the caller. Earlier Slide Future Slide https://propertyingurugram.in/gurugram-nhai-to-build-pachgaon-toll-plaza-for-18-crore-in-3-months/