Description #
J is a high-level, array-based programming language designed for mathematical, statistical, and logical analysis. It features concise syntax and powerful operators, often used for data science, algorithmic trading, and scientific computing.
History #
J was developed in the early 1990s by Kenneth E. Iverson (creator of APL) and Roger Hui as a modern successor to APL. It retained the array-centric focus of APL but used ASCII characters instead of specialized symbols, making it more accessible and portable.
Hello World Code #
'Hello, World!'How to Run #
Option 1: Online
Option 2: Local
- Download and install J from JSoftware
- Open the J console and enter:
'Hello, World!'Key Concepts #
- Array-based programming
- Concise, symbolic syntax
- Functional composition and tacit programming
- Mathematical focus
- Extensive standard library
- High-level and expressive code
- Powerful data analysis tools
- Works well for statistical modeling
- ASCII-based (unlike APL)
- Cross-platform and open-source
Try It Online #
Fun Facts #
- J’s syntax is so concise, many programs fit on one line.
- It was designed to be an ASCII-compatible evolution of APL.
- J software is widely used in algorithmic trading and quantitative analysis.
