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Regular Expressions & BNF

Regular Expressions & BNF. This lesson we, looking at the syntax of a language, will be. Yes, hmmm. Formal Language. Is defined using: A set alphabet Rules of syntax for constructing the language. Tasks. A formal language is used for car licence plates.

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Regular Expressions & BNF

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  1. Regular Expressions & BNF

  2. This lesson we, looking at the syntax of a language, will be. Yes, hmmm.

  3. Formal Language • Is defined using: • A set alphabet • Rules of syntax for constructing the language

  4. Tasks • A formal language is used for car licence plates. • Define the alphabet for this language • Construct a string for a licence plate.

  5. Regular Language • A regular language is any string that can be created using a Finite State Machine. • Eg: a(a|b)* Or is signified by | One or more is signified by *

  6. Tasks • A web address uses a regular language • Define a web address using a Regular Expression

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