BETA - Programming language

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BETA is a programming language created in 1983 by Bent Bruun Kristensen and Ole Lehrmann Madsen and Birger Møller-Pedersen and Kristen Nygaard.

#516on PLDB

40Years Old

BETA is a pure object-oriented language originating within the "Scandinavian School" in object-orientation where the first object-oriented language Simula was developed. Among its notable features, it introduced nested classes, and unified classes with procedures into so called patterns.. Read more on Wikipedia...

BETA website
BETA Wikipedia page
BETA first developed in Scandinavian School of object- orientation
Explore BETA snippets on Rosetta Code
BETA on HOPL
BETA appears in the TIOBE Index
See also: (2 related languages)Simula, Eiffel

Example from hello-world:

ORIGIN '~beta/basiclib/betaenv'
-- program: Descriptor --
(* Hello World in BETA *)
(# do 'Hello World' -> putLine #)

Example from the Hello World Collection:

{ *** Hello World in BETA ***}
(#
  do
     'Hello World!'->putLine
#)

Example from Wikipedia:

max: (#
    x, y, z: @integer
enter (x, y)
do
    (if x >= y // True then
        x -> z
    else
        y -> z
    if)
exit z
#)