expensetracker.py

#declaring an empty list 
expenses = []

#function to add expense
def add_expense():
    try:
        amount = float(input("Please enter the expense: \n"))
        expenses.append(amount)
        print("Expense added successfully!\n")
    except ValueError:
        print("Invalid input. Please enter the valid input!\n")



#function to view expenses
def view_expenses():
    if len(expenses) == 0:
        print("No expenses recorded\n")
    else:
        print("Your expenses are: ")
        for index, amt in enumerate(expenses, 1):
            print(f"{index} {amt}")


#function to calculate total and average
def total_avg_expenses():
    if len(expenses) == 0:
        print("No expenses are recorded\n")
    else:
        total = sum(expenses)
        avg = total/len(expenses)
        print(f"Total expense is: {total}")
        print(f"Average of expenses is: {avg:.2f}\n")

#function to clear all expenses
def clear_expenses():
    expenses.clear()
    print("All expenses are cleared!\n")


#function to display menu
def menu():
    while(True):
        print("***Menu***")
        print("1. Add expense")
        print("2. View all expense")
        print("3. Total and Average of expenses")
        print("4. Clear all expenses")
        print("5. Exit")

        choice = input("Please enter the choice: ")

        if choice == "1":
            add_expense()
        
        elif choice == "2":
            view_expenses()
        
        elif choice == "3":
            total_avg_expenses()
        
        elif choice == "4":
            clear_expenses()
        
        elif choice == "5":
            print("Exiting")
            break
        
        else:
            print("Inavlid choice! Please try again.")

menu()