07. Area of Figures

package ConditionalStatements;

import java.util.Scanner;

public class P07AreaOfFigures {

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

        String figure = scanner.nextLine();

        double area = 0;

        if(figure.equals("square")){
            double squareSide = Double.parseDouble(scanner.nextLine());
            area = squareSide * squareSide;
        } 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 sideA = Double.parseDouble(scanner.nextLine());
            double ha = Double.parseDouble(scanner.nextLine());
            area = sideA * ha / 2;
        }


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

    }
}