Prolog
Prolog is a logic programming language that uses formal logic rules to solve problems. It is mainly used for tasks such as artificial intelligence, natural language processing, and expert systems.
Hello, world code example:
:- write('Hello world!'), nl.
Popularity: 0.89% of developers are using or have used this language.*
*According to StackOverflow's 2023 survey.
Repositories on GitHub: 25,981