Banco.java

import java.util.Scanner;

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

        System.out.println("Name: ");
        String name = scanner.next();

        System.out.println("Account type: ");
        String accountType = scanner.next();

        System.out.println("Initial balance: ");
        double initialBalance = scanner.nextDouble();

        System.out.println(String.format("""
                ***********************************
                Client initial data:
                
                Name: %s
                Account type: %s
                Initial balance: $ %.2f
                ***********************************
                
                """, name, accountType, initialBalance));

        while (true) {
            System.out.println("""
                    
                    Operations:
                    
                    1 - Check balance
                    2 - Receive money
                    3 - Transfer money
                    4 - Exit
                    
                    """);

            int option = scanner.nextInt();

            if (option == 1) {
                System.out.println(String.format("Your current balance is: %.2f", initialBalance));

            } else if (option == 2) {
                System.out.println("Enter the amount to receive: ");
                double amountReceived = scanner.nextDouble();
                initialBalance += amountReceived;
                System.out.println(String.format("Updated balance: %.2f", initialBalance));

            } else if (option == 3) {
                System.out.println("Enter the amount to transfer: ");
                double amountToTransfer = scanner.nextDouble();

                if (amountToTransfer > initialBalance) {
                    System.out.println("Invalid option: insufficient balance.");

                } else {
                    initialBalance -= amountToTransfer;
                    System.out.println(String.format("Updated balance: %.2f", initialBalance));
                }

            } else if (option == 4) {
                System.out.println("GOODBYE!");
                break;

            } else {
                System.out.println("Invalid option, please enter a valid one.");
            }
        }

        scanner.close();
    }
}