J is an interpreted array based programming language which is highly interactive, reflective, and object-oriented. J has been around since the 1990s and is still going strong today, with an active open-source community.

J is an array-based interpreted programming language created by Ken Iverson and Roger Hui at I.P. Sharp Associates in the 1990s that is interactive, reflective, and object-oriented. J combines the syntax of the APL programming language and other high-level languages like C and Java. Because of this, J is both easy to learn and powerful.

One major benefit of J is that it is designed for extensibility. It enables developers to extend the language by writing external functions and libraries that can interact with the J core. This makes J an ideal choice for high-level applications, such as data analysis and numerical computing. It also makes J a great choice for exploring new programming paradigms and concepts.

Another unique feature of J is its property of reflective self-modification. This means that code can be modified while the program is running, allowing developers to experiment and make quick changes as they develop their application. This feature makes J especially useful for experimenting with data and finding new correlations.

Furthermore, J is highly interactive and makes it easy to develop and debug applications. This makes it an ideal choice for beginner and intermediate programmers, who can quickly pick up the language and begin creating their own applications. It also makes it a great choice for teaching programming.

J is an incredibly powerful and versatile language, with an active open-source community. It has been used extensively in the finance industry, as well as in scientific, mathematical, and statistical computing. J is also suitable for game development, web development, desktop applications, and general programming. It is a great choice for developing data-driven applications and pushing the boundaries of development.