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Introduction to programming with Python
  • Introduction to programming with Python 3
  • Preface
    • Common misconceptions about learning to program
    • The Hard truth about learning to program
    • Personal qualities for success
  • 1 - The way of the program
    • Python Programming Language
    • The first program
    • What is debugging?
    • Glossary
    • Exercises
  • 2 - Variables, expressions and statements
    • Values, types and variables
    • Common Built-in data types
    • Expressions
    • Code Format
    • Debugging
    • Glossary
    • Exercises
  • 3 - Functions
    • Python "built-in" Functions
    • Math Functions
    • Composition
    • User Defined Functions
    • PEP 8 Recommendations
    • Debugging
    • Glossary
    • Exercises
  • 4 - Conditionals
    • Boolean expressions
    • Conditional statements
    • PEP 8 Recommendations
  • 5 - Iteration
    • The while statement
    • The for statement
    • break and continue statements
    • Nested Loops
    • PEP 8 Recommendations
    • Debugging
    • Glossary
    • Exercises
  • 6 - A short introduction to testing: Building Reliable Software
  • 7 - A deeper dive into Strings, Lists and Tuples
    • More on Strings
    • More on Lists
    • More on Tuples
    • Debugging
    • Glossary
    • Exercises
  • 8 - A deeper look at Functions in Python
    • Function Preconditions and Postconditions
    • Positional and Keywords arguments
    • Nested Functions
    • Scope of a variable
    • Recursion
    • Functions' side effects
    • Glossary
    • Exercises
  • 9 - Code Documentation
    • Basics of Commenting Code
    • Documenting Code via Python Docstring
  • 10 - Sets and dictionaries
    • Sets
    • Dictionaries
    • Which data structure should I use?
    • Debugging
    • Glossary
    • Exercises
  • 11 - File I/O
    • Read/Write to a file
    • File management
    • Debugging
    • Glossary
    • Exercises
  • 12 - Handling Errors and Exceptions
  • 13 - Writing modules
  • 14 - Classes
    • Classes and Objects
    • Classes and Functions
    • Classes and Methods
    • Pythonic Magic: Understanding and Implementing Dunder Methods
    • Glossary
    • Exercises
  • 15 - Python's Type Hinting
  • Acknowledgements
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2 - Variables, expressions and statements

In the previous chapter we wrote our first (albeit very basic) program. In this chapter we will learn to write more complex programs using fundamental programming concepts such as variables.

We will learn about operators and operands, the building blocks of a Python expressions. We will also look at how to build more complex expression and assign the result of the computation to a variable.

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Last updated 1 year ago