October 2023 TIOBE Index Shows C# Overtaking Java and Potential Drop to Fifth Place

The October 2023 TIOBE programming language index has been released, highlighting notable changes in language popularity for the month.

C# Overtaking Java : After Java fell out of the Top 3 in December 2022, it now faces the risk of being overtaken by C#, which could push Java down to the fifth spot. Java’s decline in the Top 20 is the largest at 3.92%, while C# has risen by 3.29%, narrowing the gap to just 1.2%.

According to TIOBE, if the current trend continues, C# is expected to surpass Java within two months.

Both languages share many similarities—object‑oriented design, comparable syntax, intermediate‑code execution, cross‑platform support, automatic garbage collection, and similar exception handling. However, C# differentiates itself with features borrowed from Delphi, direct COM integration, array initialization syntax, preprocessor directives, and the goto statement.

Java’s waning popularity is also attributed to Oracle’s shift to a paid licensing model after Java 8, whereas Microsoft has made C# free and open‑source, increasing its appeal.

Additional factors include Java’s relatively static language definition versus Kotlin’s free, more user‑friendly alternative, which has climbed to rank 18 in the Top 20.

Other Programming Languages : The article lists the rankings for positions 21‑50 with accompanying images, and provides a textual list for positions 51‑100, covering languages such as 4th Dimension/4D, Apex, Ballerina, Clojure, Elixir, Erlang, Groovy, Kotlin, and many others.

Top 10 Language Trend (2002‑2023) : A chart illustrates the historical movement of the top ten languages over the past two decades.

Historical Rankings (1988‑2023) : An image shows the average rankings over a 12‑month period, emphasizing long‑term trends.

Programming Language “Celebrity” Rankings (2003‑2022) : Another visual highlights the most prominent languages during that span.

The TIOBE index reflects language popularity based on the number of engineers, courses, and third‑party vendors, using data from search engines and tech communities such as Google, Baidu, Wikipedia, CSDN, Bing, and others. Detailed methodology is available on the TIOBE website.

While the index indicates popularity, it does not assess language quality or code volume; it serves as a reference for skill relevance and language selection when developing new systems.