J is an actively used programming language created in 1990.

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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
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Last updated February 11th, 2019