J

J is an actively used programming language created in 1990. The J programming language, developed in the early 1990s by Kenneth E. Iverson and Roger Hui, is a synthesis of APL (also by Iverson) and the FP and FL function-level languages created by John Backus. To avoid repeating the APL special-character problem, J uses only the basic ASCII character set, resorting to the use of the dot and colon as inflections to form short words similar to digraphs. Read more on Wikipedia...

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• J ranks in the top 5% of languages
• the J website
• the J wikipedia page
• J first appeared in 1990
• file extensions for J include ijs
• tryitonline has an online J repl
• See also: linux, apl, fp, fl, numpy, supercollider, ascii, unix, sql, c, unicode, k, q
• I have 94 facts about J. what would you like to know? email me and let me know how I can help.

Example code from the Hello World Collection:

NB. Hello World in J
'Hello World' 1!:2(2)

Example code from Linguist:

#!/bin/jconsole
echo 'Hello, GitHub!'
exit ''

Example code from Wikipedia:

3 |. 1 0 1 1 0 0 1 1 1 1 1             NB. rotate
1 0 0 1 1 1 1 1 1 0 1

Last updated August 25th, 2019