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

public static double circleArea(double radius){

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

return area;

}

Step-by-step 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;

}

}