Module 2 Overview

Module 2: Variables and Data Types shifts our focus from the environment to the language itself. At the heart of every program lies data—numbers, text, and logic states.

In this module, we will explore Python’s unique approach to variable management (the Reference Model), which differs significantly from languages like C or Java. We will then dive deep into the fundamental building blocks of data: the primitive types.

Learning Objectives

By the end of this module, you will be able to:

• Explain Python’s “Reference Model” and how it differs from the “Box Model” of variables.
• Identify and utilize the four primary primitive data types: int, float, bool, and str.
• Apply arithmetic, logical, and comparison operators to control program logic.
• Perform advanced string manipulations, including slicing, formatting, and method application.
• Safely convert data between different types using explicit type casting.

Module Contents

The Reference Model (Variables) Understanding variables as labels/references rather than storage boxes.

Primitive Data Types A deep dive into Integers, Floats, and Booleans.

Operators in Depth Arithmetic, Logical, Comparison, and Bitwise operations.

String Manipulation Mastering text processing: Slicing, f-strings, and methods.

Type Casting Converting between data types explicitly and safely.