SimpleConditionalStatements-AreaOfFigures_AngelKalinkov

import java.util.Scanner;

public class AreaOfFigures {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String geometricShape = scanner.nextLine().toLowerCase();

        switch (geometricShape) {
            case "square":
                double side = Double.parseDouble(scanner.nextLine());
                System.out.printf("%.3f%n", (side * side));
                break;
            case "rectangle":
                double length = Double.parseDouble(scanner.nextLine());
                double width = Double.parseDouble(scanner.nextLine());
                System.out.printf("%.3f%n", (length * width));
                break;
            case "circle":
                double radius = Double.parseDouble(scanner.nextLine());
                System.out.printf("%.3f%n", (Math.PI * radius * radius));
                break;
            case "triangle":
                double base = Double.parseDouble(scanner.nextLine());
                double hight = Double.parseDouble(scanner.nextLine());
                System.out.printf("%.3f%n", (base * hight / 2));
                break;
            default:
                System.out.println("Unknown geometric shape.");
        }
    }
}