Of this abstraction. The values for getRadius() or getCircumference() in the above example can be stored specifically, or they may be calculated, it won't make a difference for the caller; the setters may well or won't have Unwanted effects; it will not matter to the caller. Traditional getters and setters https://whitelandsector103gurgaon.school.blog/2025/07/08/smart-world-one-dxp-sector-113-gurgaon-leads-the-future-of-intelligent-living/