Computer Dictionary/ALGOL 68
Wijngaarden et al. ALGOL 68 was discussed from 1963 by Working Group 2.1 of IFIP. Its definition was accepted in December 1968.
ALGOL 68 was complex, and posed difficulties for both implementors and users. It featured structural equivalence; automatic type conversion ("coercion") including dereferencing; flexible arrays; generalised loops (for-from-by-to-while-do-od), if-then-elif-fi, an integer case statement with an 'out' clause; skip and goto statements; blocks; procedures; user-defined operators; [[Computer Dictionary/procedure parameters|procedure parameters]]; concurrent execution (cobegin/coend); semaphores; generators "heap" and "loc" for [[Computer Dictionary/dynamic allocation|dynamic allocation]]. It had no abstract data types or [[Computer Dictionary/separate compilation|separate compilation]].
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