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Fjölnir (programming language)

From Wikipedia, the free encyclopedia
Paradigmprocedural, object-oriented
Designed bySnorri Agnarsson
First appeared1980s
Typing disciplinestrong, dynamic
Filename extensions.fjo, .fjv, .sma, .ein

Fjölnir (also Fjolnir or Fjoelnir) is a programming language developed by professor Snorri Agnarsson of computer science at Háskóli Íslands (University of Iceland) that was mostly used in the 1980s. The source files usually have the extension fjo or sma.


Fjölnir is based on the concept of representing programs as trees, and packages by substitutions on trees using algebraic operators.[1] For example, in the Hello World example below, "GRUNNUR" is a package, the block of code between braces is a package, and * is an operator that substitutes names in one package with elements from another. In this case, skrifastreng (which writes a string to the standard output) is imported from "GRUNNUR".

Code examples[edit]

;; Hello world in Fjölnir

"hello" < main
    main ->
        skrifastreng(;"Hello, world!"),

External links[edit]


  1. ^ Agnarsson, Snorri; Krishnamoorthy, M. S. (1985). "Towards a theory of packages". ACM SIGPLAN Notices. 20 (7): 117–130. doi:10.1145/17919.806833.