J

J is a high-level, array-oriented programming language designed by Kenneth E. Iverson and Roger Hui, created as a modern successor to APL with ASCII-only syntax.

Installation

Install J by downloading and extracting the official J release:

apt update
apt install -y wget tar
wget https://www.jsoftware.com/download/j904/install/j904_linux64.tar.gz
tar -xzf j904_linux64.tar.gz
sudo cp -r j904/bin/* /usr/local/bin/

Alternatively, you can run the J console (jconsole) directly from the extracted directory.

Verification

Check that the J console starts properly:

jconsole -version

Writing and Executing Code

Create a J script file named hello.ijs:

echo 'Hello, World!'
exit 0

Execute the script with jconsole:

jconsole hello.ijs

Official Resources

• Official Website