K - Programming language

K is a programming language created in 1993 by Arthur Whitney.

#431on PLDB

31Years Old

K is a proprietary array processing language developed by Arthur Whitney and commercialized by Kx Systems. Since then, an open-source implementation known as Kona has also been developed. The language serves as the foundation for kdb+, an in-memory, column-based database, and other related financial products. Read more on Wikipedia...

K Wikipedia page
K first developed in Kx Systems
file extensions for K include k
There are 2,478 Project Euler users using K
Explore K snippets on Rosetta Code
K on HOPL
Pygments supports syntax highlighting for K
See also: (8 related languages)Scheme, Q, APL, SQL, J, SQL-92, Solaris, Linux

Example from hello-world:

"Hello World\n"

Example from the Hello World Collection:

/ Hello world in K

"Hello world!"

Feature	Supported	Token	Example
Binary Literals	✓		/ [01]+b
Integers	✓		/ [0-9]+[ihtuv]
Floats	✓		/ ([0-9][.]?[0-9]+\|[0-9]+[.]?[0-9])[eE][+-]?[0-9]+[ef]?
Hexadecimals	✓		/ [0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}
Line Comments	✓	/	/ A comment
Comments	✓
Semantic Indentation	X

K

K - Programming language

Language features