Of this abstraction. The values for getRadius() or getCircumference() in the above mentioned case in point can be stored directly, or they could be calculated, it does not make any difference to your caller; the setters may or may not have side effects; it doesn't matter to your caller. @Jenix https://propertyingurugram.in/d2c-brands-turn-to-malls-for-immersive-retail-experiences-amid-booming-demand/