Question

Write a method that returns the area of a circle given the radius.

Use the Math.PI method.

Answer 1

import java.util.Scanner;

public class AreaOfCircle {

    public static double getCircleArea(double radius) {
        return Math.PI * radius * radius;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter radius of circle: ");
        double radius = in.nextDouble();
        System.out.println("Area of circle is " + getCircleArea(radius));
    }
}