Question

Write a method named circleArea that accepts the radius of a circle as a parameter (as a real number) and returns the area of a circle with that radius. For example, the call of area(2.0) should return 12.566370614359172. You may assume that the radius passed is a non-negative number.

Answer 1

Answer:

  public static double circleArea(double radius){

       double area = 3.142*Math.pow(radius,2);

       return area;

   }

Explanation:

Find the complete program in java that prompts the user to enter a value for radius, stores it in a variable, calls the method circleArea() and passes the value for the radius, then displays the area.

import java.util.Scanner;

public class CocaColaVendingTest {

   public static void main(String[] args) {

       Scanner in = new Scanner(System.in);

       System.out.println("Please enter the value for radius");

       double r = in.nextDouble();

       //Calling the method circleArea()

       double calcArea = circleArea(r);

       System.out.println("The Area is: "+calcArea);

   }

   public static double circleArea(double radius){

       double area = 3.142*Math.pow(radius,2);

       return area;

   }

}