Machine Problem

 Write a program  to ask the user to give the radius of a circle, then the program   will calculate, and display the area and circumference of the circle on the screen using Java programming language.

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Program Listing

// area_circumference_circle.java
// Jake Rodriguez Pomperada,MAED-IT, MIT
// www.jakerpomperada.blogspot.com  and www.jakerpomperada.com
// jakerpomperada@gmail.com
// Bacolod City, Negros Occidental Philippines

/* 
 * Machine Problem
 * 
 * Write a program  to ask the user to give the radius of a circle, then the program
 * will calculate, and display the area and circumference of the circle on the screen.
 * 
 */

import java.util.Scanner;
import java.math.RoundingMode;
import java.text.DecimalFormat;


public class area_circumference_circle {
    
     private static DecimalFormat df2 = new DecimalFormat("#.##");

    public static void main(String[] args) {

        double radius=0.00;
        double area=0.00, circumference=0.00;
        
        Scanner scan = new Scanner(System.in);
        
              
        System.out.println();
        System.out.print("\tArea, and Circumference of a Circle in Java ");
        System.out.println("\n");
                     
        System.out.print("\tGive the Radius of the Circle : ");
        radius = scan.nextDouble();
      
        area = (3.14*radius*radius);
        
        circumference = (2 * 3.14 * radius);
      
        System.out.println("\n");
        System.out.print("\tThe Area of The Circle : " + df2.format(area));
        System.out.println("\n");
        System.out.print("\tThe Circumference of The Circle : " + df2.format(circumference));
        System.out.println("\n");
        System.out.println("\tEnd of Program");
        System.out.println();
   }
}

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