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LL

   Also found in: Dictionary/thesaurus, Acronyms, Wikipedia 0.01 sec.
LL
(communications)
line link
LL
On drawings, abbr. for live load.
(grammar)LL - A class of language grammars, which can be parsed without backtracking. The first L stands for Left-to-right scan, the second for Leftmost derivation.

Often found in the form LL(k) where k is the number of tokens of look-ahead required when parsing a sentence of the language. In particular, LL(1) is a fairly restrictive class of grammar, but allows simple top-down parsing (e.g. recursive-descent) to be used without wasteful backtracking. A number of programming languages are LL(1) (or close).
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