Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned instance could be stored instantly, or they could be calculated, it will not issue on the caller; the setters could or may not have Negative effects; it doesn't matter for the caller. Properties are useful in that https://godrejconnaughtonegurgaon.blogspot.com/2025/07/smart-world-edition-gurgaon-emerges-as.html