Python
Lists
Lists in Python
What is it?
Lists are ordered collections of values in square brackets.
Why does it exist?
Lists store multiple items in one variable.
Examples
Basic
Example 1
colors = ["red", "blue", "green"]Create a list of strings.
Intermediate
Example 1
colors.append("yellow")Add an item to the list.
Advanced
Example 1
first = colors[0]Access an item by index.
Common Mistakes
Common mistakes with lists: 1. Using the wrong index 2. Forgetting lists are zero-based 3. Modifying a list while looping
Write it once before proceeding
This helps your brain start forming the pattern.
colors = ["red", "blue", "green"]Lists hold many items
Simple Explanation
Lists keep items in order.
Think of it like this
Like a row of numbered boxes.
Tiny Example
nums = [1, 2, 3]Core Drill: Lock It In
Write the same concept 50 times to make it permanent. Your progress is saved automatically.
Repetitions0 / 50
🔒
Sign In to Unlock
Complete all 50 repetitions and lock this concept in your memory forever.