Examples of Lists in Grade 6 Computer Science

📚 Quick Study Guide

• 🍎 Definition: A list is a collection of items, where each item has a specific order. Think of it like a numbered shopping list!
• 🔢 Indexing: List items are accessed by their index (position). In most programming languages, the first item is at index 0, the second at index 1, and so on.
• ➕ Adding Items: Items can be added to a list using methods like `append()` in Python.
• ➖ Removing Items: Items can be removed using methods like `remove()` or `pop()`.
• 🔄 Modifying Items: Items in a list can be changed directly by referring to their index.
• 📏 Length: You can find the number of items in a list using the `len()` function (in Python).
• 🧮 Example (Python): ```python my_list = [10, 20, 30] print(my_list[0]) # Output: 10 my_list.append(40) print(my_list) # Output: [10, 20, 30, 40] ```

Practice Quiz

1. Question 1: What is a list in computer science?
   1. A type of computer.
   2. A collection of items in a specific order.
   3. A function that performs calculations.
   4. A type of loop.
2. Question 2: What is the index of the first item in a list (in most programming languages)?
   1. 1
   2. -1
   3. 0
   4. It varies.
3. Question 3: Which of the following operations can be performed on a list?
   1. Adding items
   2. Removing items
   3. Modifying items
   4. All of the above
4. Question 4: What does the `append()` method do to a list?
   1. Removes the last item.
   2. Adds an item to the end of the list.
   3. Sorts the list.
   4. Reverses the list.
5. Question 5: In Python, what function is used to determine the number of items in a list?
   1. `count()`
   2. `size()`
   3. `len()`
   4. `length()`
6. Question 6: If `my_list = [5, 10, 15]`, what is the output of `print(my_list[1])`?
   1. 5
   2. 10
   3. 15
   4. Error
7. Question 7: Which of the following is NOT a valid operation on a list?
   1. Accessing an item by its index.
   2. Changing the data type of the list itself to a string.
   3. Adding a new item to the list.
   4. Removing an item from the list.