On Day 2, we dive into writing clean, modular code using functions, parameters, and return values. You'll learn how real developers structure logic, name things clearly, and debug effectively using print statements, trace logic, and breakpoints. We’ll explore reading Python documentation and using ChatGPT for code reviews. We’ll also cover lists, tuples, dictionaries, and sets, with live exercises like a random name generator, palindrome checker, and debugging broken code.