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#exe6_Create a function to update the available quantity of an 
#existing product, taking as input the product name and the 
#new available quantity.

# Create an empty dictionary to represent the warehouse
warehouse = {}

# Define a function to add a new product to the warehouse
def add_product(name, quantity):
    # Check if the product already exists in the warehouse
    if name in warehouse:
        print(f"Product '{name}' already exists in the warehouse.")
    else:
        # Add the product to the warehouse with its quantity
        warehouse[name] = {'quantity': quantity}
        print(f"Product '{name}' has been added to the warehouse.")

# Input the products and their quantities
n = int(input("Enter the number of products: "))
for i in range(n):
    name = input("Enter the name of the product: ")
    quantity = int(input("Enter the available quantity of the product: "))
    add_product(name, quantity)

# Define a function to update the available quantity of an existing product
def update_quantity(name, quantity):
    if name in warehouse:
        # Update the quantity of the existing product
        warehouse[name]['quantity'] = quantity
        print(f"The available quantity of '{name}' has been updated to {quantity}.")
    else:
        print(f"Product '{name}' does not exist in the warehouse.")

# Test the update_quantity function by asking the user to input a product name and quantity
name = input("Enter the name of the product to update: ")
quantity = int(input("Enter the new available quantity of the product: "))
update_quantity(name, quantity)

# Print the contents of the warehouse
print("Current contents of the warehouse:")
for product, details in warehouse.items():
    print(f"{product}: {details['quantity']}")