8 Levels of Writing Python Functions

Level 1: Basic Function Definition

Goal: Learn how to define simple functions with def.

def greet():
    return "Hello, World!"

Concepts: Function definition, return statement, and basic usage.

Level 2: Function Arguments

Goal: Understand how to pass data to functions using arguments.

def greet(name):
    return f"Hello, {name}!"

Concepts: Positional arguments, basic string formatting.

Level 3: Default Arguments

Goal: Use default argument values to make functions more flexible.

def greet(name="World"):
    return f"Hello, {name}!"

Concepts: Default values, handling optional parameters.

Level 4: Variable-Length Arguments

Goal: Handle an arbitrary number of arguments using args and *kwargs.

def greet(*names):
    return "Hello, " + ", ".join(names) + "!"