Reference library
Functions & basics
Small reusable building blocks — parameters, returns, and clear function design.
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Functions & basics
easy
Function with default argument
Define a reusable greet helper with an optional prefix parameter.
functions
defaults
basics
Python
def greet(name, prefix="Hello"):
return f"{prefix}, {name}!"
print(greet("Python"))
print(greet("World", prefix="Hi"))
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Functions & basics
medium
Return multiple values
Return a tuple of results and unpack them at the call site.
functions
return
tuple
Python
def min_max(values):
if not values:
return None, None
return min(values), max(values)
data = [3, 9, 1, 7]
lo, hi = min_max(data)
print(f"range: {lo} .. {hi}")
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Each section groups closely related Python snippets.
Functions & basics — Python code examples
What you will find here
This page collects functions & basics 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.