From Rosetta Code
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This programming language may be used to instruct a computer to perform a task.
Official website
Garbage collected: Yes
Type checking: Dynamic
See Also:

Listed below are all of the tasks on Rosetta Code which have been solved using K.

K is a proprietary array processing language developed by Arthur Whitney and commercialized by Kx Systems. The language serves as the foundation for kdb, an in-memory, column-based database, and other related financial products. The language, originally developed in 1993, is a variant of APL and contains elements of Scheme. Advocates of the language emphasize its speed, facility in handling arrays and its expressive syntax.[1]

There are many dialects of K named after the versions of K produced by Whitney while working at various companies. K1 and K2 are no longer available. K3, K4, K5 and K6 have been implemented as open-source by various people. K7 has been publicly documented. The current language level under development by Whitney is K9, with its implementation named shakti.


  • ktye/i is a portable K6 written in Go
  • ngn/k is a K6 written in C
  • oK is a K5 written in JavaScript
  • Kona is a K3 written in C
  • shakti is a proprietary K9


  • APL provided the inspiration for K
  • Klong is closely related to K
  • Kuc is closely related to K




  1. Wikipedia K Programming Language


This category has the following 3 subcategories, out of 3 total.

Pages in category "K"

The following 171 pages are in this category, out of 171 total.