Xử lý lỗi

print("Welcome to the Daily Expense Tracker!")

# Display menu once
print("\nMenu:")
print("1. Add a new expense")
print("2. View all expenses")
print("3. Calculate total and average expense")
print("4. Clear all expenses")
print("5. Exit")

# Initialize an empty list to store expenses
expenses = []

while True:
    # Get user choice
    choice = input()
    
    if choice == "1":
        # Add a new expense
        amount = float(input())
        expenses.append(amount)
        print("Expense added successfully!")

    elif choice == "2":
        # View all expenses
        if len(expenses) == 0:
            print("No expenses recorded yet.")
        else:
            print("Your expenses:")
            for i in range(len(expenses)):
                print(f"{i + 1}. {expenses[i]}")

    elif choice == "3":
        # Calculate total and average expense
        if len(expenses) == 0:
            print("No expenses recorded yet.")
        else:
            total = 0
            for expense in expenses:
                total += expense
            average = total / len(expenses)
            print(f"Total expense: {total}")
            print(f"Average expense: {average}")

    elif choice == "4":
        # Clear all expenses
        expenses = []
        print("All expenses cleared.")

    elif choice == "5":
        # Exit the program
        print("Exiting the Daily Expense Tracker. Goodbye!")
        break