1// Java program to calculate area of circle rectangle and triangle using switch statement
2import java.util.Scanner;
3public class FindAreaUsingSwitchStatement 
4{
5   public static void main(String[] args) 
6   {
7      Scanner sc = new Scanner(System.in);
8      System.out.println("MENU:");
9      System.out.println("1.Area of circle");
10      System.out.println("2.Area of triangle");
11      System.out.println("3.Area of rectangle");
12      System.out.println("Please enter any of the above option: ");
13      int num = sc.nextInt();
14      switch(num)
15      {
16         case 1: System.out.println("Please enter radius of circle: ");
17         double radius = sc.nextFloat();
18         double areaCircle = (22 * radius * radius) / 7;
19         System.out.println("Area of circle is: " + areaCircle);
20         break;
21         case 2: System.out.println("Please enter base and height of triangle: ");
22         double base = sc.nextFloat();
23         double height = sc.nextFloat();
24         double areaTriangle = (base* height) / 2;
25         System.out.println("Area of triangle is: " + areaTriangle);
26         break;
27         case 3: System.out.println("Please enter length and breadth of rectangle: ");
28         int length = sc.nextInt();
29         int breadth = sc.nextInt();
30         int areaRectangle = length * breadth;
31         System.out.println("Area of ractangle is: " + areaRectangle);
32         break;
33         default:System.exit(0);
34      }
35      sc.close();
36   }
37}