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Action! - Programming language

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Action! is a programming language created in 1983.

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Action! is a procedural programming language similar to ALGOL 68 that is intended to produce high-performance programs for the Atari 8-bit family. The language was written by Clinton Parker and distributed on ROM cartridge by Optimized Systems Software starting in 1983. Action! was used to develop at least two commercial products—the Homepak productivity suite and Games Computers Play client program—and numerous programs in ANALOG Computing and Antic magazines. Read more on Wikipedia...

Example from Wikipedia:
BYTE RTCLOK=20, ; addr of sys timer SDMCTL=559 ; DMA control BYTE ARRAY FLAGS(8190) CARD COUNT,I,K,PRIME,TIME PROC SIEVE() SDMCTL=0 ; shut off Antic RTCLOK=0 ; only one timer needed COUNT=0 ; init count FOR I=0 TO 8190 ; and flags DO FLAGS(I)='T ; "'T" is a compiler-provided constant for True OD FOR I=0 TO 8190 ; and flags DO IF FLAGS(I)='T THEN PRIME=I+I+3 K=I+PRIME WHILE K<=8190 DO FLAGS(K)='F ; "'F" is a compiler-provided constant for False K==+PRIME OD COUNT==+1 FI OD TIME=RTCLOK ; get timer reading SDMCTL=34 ; restore screen PRINTF("%E %U PRIMES IN",COUNT) PRINTF("%E %U JIFFIES",TIME) RETURN

Language features

Feature Supported Token Example
Booleans True False
Print() Debugging PRINTF
; A comment
Line Comments ;
; A comment
Semantic Indentation X

Books about Action! on goodreads

title author year reviews ratings rating
Action Programming Languages Michael Thielscher 1905 0 0 0.0
beta.html · action.html · mbasic.html

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