Question

Please, modify the code below to use the Switch Statements in Java instead of “if” statements to make the decisions.

import java.util.Scanner;

public class Area {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter code(C for circle, R for rectangle, S for square): ");
        char code = in.next().charAt(0);

        if(code == 'C') {
            System.out.print("Enter radius: ");
            double radius = in.nextDouble();
            System.out.println("Area of circle is " + (Math.PI * radius * radius));
        } else if(code == 'R') {
            System.out.print("Enter width: ");
            double width = in.nextDouble();
            System.out.print("Enter height: ");
            double height = in.nextDouble();
            System.out.println("Area of rectangle is " + (width * height));
        } else {
            System.out.print("Enter length of side: ");
            double side = in.nextDouble();
            System.out.println("Area of square is " + (side * side));
        }
    }
}

Answer 1

import java.util.Scanner;

public class Area {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        System.out.print("Enter code(C for circle, R for rectangle, S for square): ");
        char code = in.next().charAt(0);

        switch (code) {
            case 'C':
                System.out.print("Enter radius: ");
                double radius = in.nextDouble();
                System.out.println("Area of circle is " + (Math.PI * radius * radius));
                break;
            case 'R':
                System.out.print("Enter width: ");
                double width = in.nextDouble();
                System.out.print("Enter height: ");
                double height = in.nextDouble();
                System.out.println("Area of rectangle is " + (width * height));
                break;
            default:
                System.out.print("Enter length of side: ");
                double side = in.nextDouble();
                System.out.println("Area of square is " + (side * side));
        }
    }
}