Function in Python
Functions group reusable behavior behind a name and can accept inputs through parameters.
What is Function?
Functions group reusable behavior behind a name and can accept inputs through parameters.
Define and call a Python function with parameters and a return value.
When should you use it?
- Learn Python syntax through a practical example.
- Build a foundation for larger programming problems.
- Test an idea quickly without a local setup.
Example code
main.py
def greet(name, language="Python"):
return f"Hello, {name}! Welcome to {language}."
message = greet("Grace")
print(message)Expected output
Hello, Grace! Welcome to Python.How it works
The function returns a formatted string rather than printing internally, allowing the caller to reuse the result elsewhere.
Change the values and run the program in the CodeUtility online Python compiler without installing Python locally.
Practice exercises
Modify the runnable example with the exercises below to build understanding beyond copying the result.
- Change the input and predict the output before running.
- Handle empty or invalid input.
- Wrap the logic in a function and add more test cases.