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This subchapter looks at the common lexical elements of a programming language.
The student should know what a lexical element is, what a token is, and the names of the lexical elements in the programming language being used.
free computer programming text book projecttable of contents
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This subchapter looks at the common lexical elements of a programming language.
The lexical elements of a programming language are the building blocks for making a valid program in that particular programming language.
The lexical elements are also called tokens. Note that some items, such as comments and white space, are often considered not to be a token. The line between tokens and non-tokens varies by language.
Common tokens or lexical elements include: comments, identifiers, key words, literals, operators, reserved words, separators, and white space.
We have already discuused some of these items, particularly comments and white space, when discussing good documentation techniques.
Coding example: I am making heavily documented and explained open source code for a method to play music for free — almost any song, no subscription fees, no download costs, no advertisements, all completely legal. This is done by building a front-end to YouTube (which checks the copyright permissions for you).
View music player in action: www.musicinpublic.com/.
Create your own copy from the original source code/ (presented for learning programming).
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Because I no longer have the computer and software to make PDFs, the book is available as an HTML file, which you can convert into a PDF.
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free computer programming text book projectBuilding a free downloadable text book on computer programming for university, college, community college, and high school classes in computer programming. If you like the idea of this project, Supporting the entire project: If you have a business or organization that can support the entire cost of this project, please contact Pr Ntr Kmt (my church) free downloadable college text book on computer programming. |
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Copyright © 2011 Milo
Created: January 3, 2011
Last Updated: January 3, 2011
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