Learn Programming with ZetCode

  Accessible tutorials for C#, Go, Python, Java, and JavaScript to help you master coding.

  [Explore Tutorials](/all/)


## E-books


  [Advanced PyQt5](/ebooks/advancedpyqt5/)

  [Java 2D Games Programming](/ebooks/javagames/)

  [Tkinter Programming](/ebooks/tkinter/)

  [View All E-books](/all/#ebooks)



## C# Tutorials


  [C# LINQ](/csharp/linq/)

  [C# Async/Await](/csharp/async-await/)

  [C# SQLite](/csharp/sqlite/)

  [All C# Tutorials](/csharp/)



## Python Tutorials


  [Python Tutorial](/lang/python/)

  [Python Requests](/python/requests/)

  [PyQt6 Tutorial](/pyqt6/)

  [All Python Tutorials](/python/)



## Latest Updates


  [Java Type promotions](/java/type-promotions/) - June 2, 2025

  [C# KeyValuePair](/csharp/keyvaluepair/) - May 14, 2025

  [F# Active Patterns](/fsharp/active-patterns/) - April 3, 2025

  [Java HttpClient](/java/httpclient/) - April 17, 2025

  [Python Pitfalls](/python/pitfalls/) - April 2, 2025

  [Python Unittest](/python/unittest/) - March 22, 2025

  [See More Updates](/all/#latest)



## About the Author


  Jan Bodnar is a passionate programmer with over 15 years of experience.
  Since 2007, he has written 1400+ articles and 8 e-books, with 8+ years of
  teaching expertise.


Last modified June 2, 2025