What are the three operations that can be used to build complex regular expressions from simpler regular expressions?

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12-09-2022
Social Studies

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What are the three operations that can be used to build complex regular expressions from simpler regular expressions?

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Tutorconsortium359 Tutorconsortium359 · Answer 1 · 2022-09-15T11:28:25-04:00

Concatenation, Alternation and Kleene Closure are the three operations that can be used to build complex regular expressions from simpler regular expressions.

Concatenation is the linking or occurrence of several events in a way that results in a specific outcome or impact. Concatenation describes the combining of two or more objects into a single entity in the context of databases.
Of all the regex operators, the alternation operator has the lowest precedence. By telling the regex engine to match either everything to the left of the vertical bar or everything to the right of the vertical bar, it makes this instruction.
Kleene closure Including ε, but not limited to, the infinite set of all feasible strings of all feasible lengths It's indicated by ∑*.

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