Functions in Python: Basics and Advanced Concepts

Functions are blocks of reusable code in Python. They help in organizing code and making it more modular. Let's explore the basics and some advanced concepts of functions:

1. Defining a Function

Use the def keyword to define a function in Python.

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

2. Function Parameters

Functions can take parameters to accept input values.

# Example
def add_numbers(x, y):
    return x + y
        

3. Default Parameters

You can set default values for parameters in a function.

# Example
def greet_with_default(name, greeting="Hello"):
    return f"{greeting}, {name}!"
        

4. Variable-Length Arguments

Functions can accept a variable number of arguments using *args and **kwargs.

# Example
def sum_values(*args):
    return sum(args)