Functions in Python

Functions are reusable blocks of code that perform a specific task. They help organize programs, avoid repetition, and make code easier to test and debug.

Think of a function as a machine: you give it inputs (parameters), it does work, and gives back an output (return value).

Defining a Function

Use def keyword, name, parentheses, colon, and indented block.

Parameters and Arguments

Parameters are variables in the function definition. Arguments are values passed when calling.

Multiple parameters:

Return Statement

Use return to send a value back from the function.

Default Parameters

*args and **kwargs

*args for arbitrary positional arguments, **kwargs for keyword arguments.

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