Teach Yourself VISUALLY Python

CHAPTER 3

Getting Started with Variables

In this chapter, you learn to work with variables, named areas of memory that you can use to store data as your apps run. You explore the different data types Python uses and learn how to use each data type effectively. Along the way, you create variables by assigning data to them, retrieve data from variables, change the contents of variables, and determine the data type of the values assigned to variables.

Understanding Variables and Their Usage

Understanding Python’s Data Types

Work with Integers

Work with Floating-Point Values

Work with Boolean Values

Work with Tuples

Work with Sets

Start Working with Strings

Start Working with Lists

Start Working with Dictionaries

Convert Data from One Type to Another

Understanding Variables and Their Usage

In this section, you learn the essentials of variables, which are named areas of memory that you can create for storing data while your Python code runs.

Python supports various different data types, such as integers for whole-number values, Booleans for True/False values, and strings for words or other sequences of text characters. After creating a variable, you can assign any type of data to it that Python uses. See the following section, “Understanding Python’s Data Types,” for details on Python’s data types.

What Is a Variable?

A variable is an area of memory in which you can store data. ...