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Language Fundamentals > Character and Lexical Units

Character and Lexical Units

Lexical units are the basic building blocks in programming languages. They build PL/SQL programs. You develop lexical units by combining valid characters and symbols. Lexical units can be delimiters, identifiers, literals, or comments. Identifiers include reserved words and keywords as well as both subroutine and variable names.

Delimiters

Lexical delimiters are symbols or symbol sets. They can act as delimiters or provide other functions in programming languages. Other functions provided by lexical delimiters are assignment, association, concatenation, comparison, math, and statement controls.


  

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