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Functions & basics

Reusable building blocks — parameters, returns, scope, and clear function design.

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How to Parse Function Parameters with Defaults in Python

Create Python functions with default parameter values to make arguments optional and provide sensible fallbacks.

def greet(name, greeting="Hello", punctuation="!"):
    """Greet a person with customizable greeting and punctuation."""
    return f"{greeting}, {name}{punctuation}"

def describe_fruit(fruit, color="unknown", ripe=False):
    """Describe a fruit with optional attributes."""
    status = "ripe" if ripe else "not ripe…

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Functions & basics easy

How to Use Default Parameter Values in Python Functions

Shows how to define and call Python functions with default parameter values, including overriding some or all defaults and using keyword arguments.

functions default-parameters arguments

Python

def greet(name, greeting="Hello", punctuation="!"):
    """Return a greeting message using default parameters."""
    return f"{greeting}, {name}{punctuation}"

if __name__ == "__main__":
    # Using defaults
    print(greet("Alice"))
    
    # Overriding first default
    print(greet("Bob", "Hi"))
    
    # Overrid…

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Functions & basics easy

How to Use Default Parameter Values in Python Functions

This code demonstrates how to define a Python function with default parameters and call it with varying numbers of arguments to see the defaults applied.

functions parameters defaults

Python

def greet(name, greeting="Hello", punctuation="!"):
    message = f"{greeting}, {name}{punctuation}"
    print(message)

if __name__ == "__main__":
    greet("Alice")
    greet("Bob", "Hi")
    greet("Charlie", "Hey", "?")

13 0 Open

Functions & basics easy

How to use function defaults in Python

Define Python functions with default parameter values so callers can omit arguments and use sensible fallbacks.

functions default-parameters basics

Python

def greet(name="Guest", greeting="Hello", punctuation="!"):
    """Return a greeting message using default parameters."""
    return f"{greeting}, {name}{punctuation}"

def describe_pet(pet_name, animal_type="dog"):
    """Display information about a pet with a default animal type."""
    print(f"I have a {animal_type…

15 0 Open

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