Algol 60

algol 60
algorithmic language 1960.
a portable language for scientific computations. algol 60 was small and elegant. it was block-structured, nested, recursive and free form. it was also the first language to be described in bnf.
there were three lexical representations: hardware, reference, and publication. the only structured data types were arrays, but they were permitted to have lower bounds and could be dynamic. it also had conditional expressions; it introduced :=; if-then-else; very general “for” loops; switch declaration (an array of statement labels generalising fortran’s computed goto). parameters were call-by-name and call-by-value. it had static local “own” variables. it lacked user-defined types, character manipulation and standard i/o.
see also euler, algol 58, algol 68, foogol.
[“report on the algorithmic language algol 60”, peter naur ed., cacm 3(5):299-314, may 1960].

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