public class CircleCalculation
1: import java.util.Scanner;
2:
3: /**
4: Program to compute area of a circle.
5: Author: Jane Q. Programmer.
6: E-mail Address: janeq@somemachine.etc.etc.
7: Programming Assignment 2.
8: Last Changed: October 7, 2013.
9: */
10:
11: public class CircleCalculation
12: {
13: public static void main(String[] args)
14: {
15: double radius; //in inches
16: double area; //in square inches
17: Scanner keyboard = new Scanner(System.in);
18:
19: System.out.println("Enter the radius of a circle in inches:");
20: radius = keyboard.nextDouble( );
21: area = 3.14159 * radius * radius;
22: System.out.println("A circle of radius " + radius + " inches");
23: System.out.println("has an area of " + area + " square inches.");
24: }
25: }