A data type is a set of objects and a set of operations on those objects which create, build-up, destroy, modify and pick apart instances of the objects. Every programming language begins by supplying a set of data types. In LISP, the major data type is the binary tree (called an S-expression) and the basic operations are called CAR, CDR and CONS. More on this in Chapter 12. In modern imperative programming languages the usual built-in data types include integer, real, character and Boolean. Table 5-1 lists the built-in types for some of these languages.


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© Computer Science Press 1983

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  • Ellis Horowitz

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