Lists Mini Project — Shopping List

What you're building

A shopping list manager that runs in a loop.

The user can add items, remove items, and quit when done.

The list updates and prints after every action.

What you need to know first

• Lists — creating and printing
• append() and remove()
• in to check if a value exists
• for loops
• if / elif / else
• while True with break
• input()

The brief

Build a program that:

• Starts with an empty shopping list
• Shows a menu: 1 — Add item, 2 — Remove item, 3 — Quit
• Prints the current list after every action
• Handles a remove request for an item that isn't on the list
• Exits cleanly when the user picks 3

Think before you code

Before writing anything, answer these:

• What kind of loop keeps the menu running until the user quits?
• How do you add an item to a list?
• What do you check before removing an item?
• How do you print every item in the list?

Your starting point

shopping_list = []

while True:
    print("\n1 — Add item")
    print("2 — Remove item")
    print("3 — Quit")
    choice = input("Your choice: ")

    # your code here

Expected output

1 — Add item
2 — Remove item
3 — Quit
Your choice: 1
Item to add: Bread

Your list:
- Bread

1 — Add item
2 — Remove item
3 — Quit
Your choice: 1
Item to add: Milk

Your list:
- Bread
- Milk

1 — Add item
2 — Remove item
3 — Quit
Your choice: 2
Item to remove: Bread

Your list:
- Milk

1 — Add item
2 — Remove item
3 — Quit
Your choice: 2
Item to remove: Eggs
"Eggs" is not on your list.

1 — Add item
2 — Remove item
3 — Quit
Your choice: 3
List saved. Out.

Heads up!

• Check with in before calling remove() — it raises a ValueError if the item isn't there
• An empty list is still a list — printing it with a for loop just prints nothing
• while True runs forever until you break out of it
• Strip and lowercase the input if you want "bread" and "Bread" to match — optional for this exercise

The solution

shopping_list = []

def print_list(lst):
    if len(lst) == 0:
        print("Your list is empty.")
    else:
        print("\nYour list:")
        for item in lst:
            print(f"- {item}")

while True:
    print("\n1 — Add item")
    print("2 — Remove item")
    print("3 — Quit")
    choice = input("Your choice: ")

    if choice == "1":
        item = input("Item to add: ")
        shopping_list.append(item)
        print_list(shopping_list)

    elif choice == "2":
        item = input("Item to remove: ")
        if item in shopping_list:
            shopping_list.remove(item)
            print_list(shopping_list)
        else:
            print(f'"{item}" is not on your list.')

    elif choice == "3":
        print("List saved. Out.")
        break

    else:
        print("Invalid choice. Enter 1, 2, or 3.")