Calorie Calculator

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String gender = scanner.nextLine();
        double weight = Double.parseDouble(scanner.nextLine()),
                height = Double.parseDouble(scanner.nextLine()),
                basalMetabolicRate, coefficientActivity;
        int age = Integer.parseInt(scanner.nextLine());
        String physicalActivity = scanner.nextLine();

        if (gender.equals("m")) {
            basalMetabolicRate = 66 + weight * 13.7 + height * 500 - 6.8 * age;
        } else {
            basalMetabolicRate = 655 + weight * 9.6 + height * 180 - 4.7 * age;
        }

        coefficientActivity = switch (physicalActivity) {
            case "sedentary" -> 1.2;
            case "lightly active" -> 1.375;
            case "moderately active" -> 1.55;
            default -> 1.725;
        };

        int calories = (int) Math.ceil(basalMetabolicRate * coefficientActivity);
        System.out.printf("To maintain your current weight you will need %d calories per day.\n", calories);
    }
}