# Vending machine items and prices items = { '1': {'name': 'Candy', 'price': 1.25}, '2': {'name': 'Chips', 'price': 1.50}, '3': {'name': 'Soda', 'price': 2.00}, '4': {'name': 'Water', 'price': 1.00} } # Display available items and prices print("Welcome to the Vending Machine!") print("Please select an item:") for key, item in items.items(): print(f"{key}. {item['name']} - ${item['price']}") # Prompt user for input selection = input("Enter the item number you wish to purchase: ") # Check if the selected item is valid if selection in items: selected_item = items[selection] print(f"You have selected {selected_item['name']}.") amount_due = selected_item['price'] # Prompt user to insert money while amount_due > 0: try: payment = float(input(f"Please insert ${amount_due:.2f}: ")) if payment >= amount_due: change = payment - amount_due print(f"Thank you for your purchase! Your change is ${change:.2f}.") break else: print("Insufficient payment. Please insert more money.") amount_due -= payment except ValueError: print("Invalid payment amount. Please enter a valid number.") else: print("Invalid selection. Please try again.")