Functions & basics
Reusable building blocks — parameters, returns, scope, and clear function design.
How to Create Functions with Default Parameters in Python
This code defines two Python functions using default parameters to handle missing arguments gracefully, demonstrating how to work with optional inputs and keyword arguments.
def greet(name="Guest", greeting="Hello", punctuation="!"):
"""Generate a greeting message using default parameters."""
return f"{greeting}, {name}{punctuation}"
def create_profile(username="anonymous", age=0, city="Unknown", active=True):
"""Create a user profile dictionary with default values."""
r…How to Use *args and **kwargs in Python Functions
Implement a variadic function that accepts arbitrary positional and keyword arguments using *args and **kwargs.
def display_info(title, *args, **kwargs):
"""Display positional and keyword arguments received."""
print(f"Title: {title}")
print(f"Additional positional args ({len(args)}):")
for i, arg in enumerate(args, 1):
print(f" {i}. {arg}")
print(f"Keyword args ({len(kwargs)}):")
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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.