07. Aria Of Figures

package ConditionalStatements;

import java.util.Scanner;

public class AriaOfFigures_07 {

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

        //square, rectangle, circle или triangle

        String figure = scanner.nextLine();

        double area = 0;

        if(figure.equals("square")){

            double side = Double.parseDouble(scanner.nextLine());
            area = side * side;

        } else if (figure.equals("rectangle")) {

            double sideA = Double.parseDouble(scanner.nextLine());
            double sideB = Double.parseDouble(scanner.nextLine());
            area = sideA * sideB;

        } else if (figure.equals("circle")) {

            double radius = Double.parseDouble(scanner.nextLine());
            area = radius * radius * Math.PI;

        } else if (figure.equals("triangle")) {

            double side = Double.parseDouble(scanner.nextLine());
            double height = Double.parseDouble(scanner.nextLine());
            area = side * height / 2;
        }


        System.out.printf("%.3f", area);


    }
}