Functions

You will create reusable code blocks with functions. Write a greet function, call functions multiple times with different arguments, and understand the execution flow when functions are called.

You will make functions flexible with parameters. Add single parameters, use multiple parameters, and set default values for optional parameters.

You will return data from functions. Return single values, return multiple values as tuples, and use return in conditional branches for different outcomes.

You will document your functions with docstrings. Write basic docstrings describing function purpose, document parameters with their types and meanings, and document return values.

You will understand variable scope in Python. Recognize local variables inside functions, understand when to use the global keyword, and avoid common scope-related bugs.