Explain the meaning and purpose of functions in Python.

A function in Python is a named block of code that performs a specific task and can be called from other parts of the program. Functions allow:

• Reusing code without duplication.
• Structuring the program, making it more readable and maintainable.
• Accepting input parameters and returning results.

Example of a simple function:

def greet(name):
    """Prints a greeting for the given name."""
    print(f"Hello, {name}!")

# Calling the function
greet('Anna')  # Will output: Hello, Anna!