radius
Definition
In this context, "radius" refers to one of the parameters (variables) passed into the `calculateCircleArea` method. It represents half of the diameter of a circle and is used to calculate its area.
Analogy
Imagine you have a water balloon, and when you measure half its diameter with your hand, that measurement corresponds to the radius. The larger your hand span, i.e., bigger radius, more water will fit inside.
Related terms
Parameter: A parameter is a variable declared in a method's signature or definition that receives values when calling/invoke that method.
Diameter: The diameter refers to any straight line segment passing through the center point of a circle, connecting two points on its circumference.
Area: In mathematics, "area" refers to how much space or surface an object occupies or covers. In this case, it specifically relates to calculating how much space an entire circle occupies given its radius.
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