Inventory Lists

Your backpack is a list. Learn to add, count and check what you have.

🎯 What you will learn

Your Minecraft backpack holds lots of items in a row. In code, that row is a list. Lists can grow, shrink and be counted. 🎒

1. 🎒 A list

A list keeps items in square brackets, separated by commas.

bag = ["wood", "stone", "torch"]
print(bag)

2. 🔢 Count

len() tells you how many items are in the list.

print(len(bag))

3. ➕ Add

append() adds one item to the end of the list.

bag.append("apple")
print(bag)

Change the code and press ▶ Run to see what happens. You can’t break anything!

bag = ["wood", "stone", "torch"]
bag.append("apple")
print("Items:", len(bag))
for item in bag:
    print("I have", item)

🎒 Make a real backpack list on paper with 5 items. Add 2 more and count them out loud, like len() does.

bag = []
bag.append("sword")
bag.append("bread")
print(len(bag))

Tap a card to flip it over!

Start with bag = [“wood”]. Add “stone” and print how many items the bag has now. Press ▶ Run.

bag = ["wood"]