Reference library
Lists & loops
Iterate, transform, and combine sequences with readable Python patterns.
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Lists & loops
easy
Enumerate with index
Loop with both index and value — cleaner than manual counters.
loops
enumerate
lists
Python
tasks = ["read docs", "write code", "run tests"]
for i, task in enumerate(tasks, start=1):
print(f"{i}. {task}")
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Lists & loops
easy
Zip two lists
Pair items from parallel lists and iterate them together.
lists
zip
loops
Python
names = ["Ada", "Grace", "Katherine"]
scores = [98, 95, 100]
for name, score in zip(names, scores):
print(f"{name}: {score}")
print(list(zip(names, scores)))
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Each section groups closely related Python snippets.
Lists & loops — Python code examples
What you will find here
This page collects lists & loops snippets — short, copy-ready Python you can paste into our free online IDE and run without installing anything. Each sample includes a plain-English explanation and the full source code.
Samples vs tutorials and challenges
Samples are quick reference — one concept per page. For step-by-step teaching, use our Python tutorials. To test yourself, try quizzes or coding challenges. Clean up style with the Python formatter.