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to enhance the aesthetic and professional appearance of work product (for example, by disallowing overly long names, comical or "cute" names, or abbreviations); to help avoid "naming collisions" that might occur when the work product of different organizations is combined (see also: namespaces);
The second edition of the book was the best-selling book in the O'Reilly Media catalog in 1996, and one of the top 100 selling books in any category at Borders in 1996. [ 6 ] In 1998 the second edition was the 58th bestselling book at Amazon, just ahead of Bjarne Strousup 's The C++ Programming Language third edition.
The second most commonly used notation is [1] x := expr (originally ALGOL 1958, popularised by Pascal). [2] Many other notations are also in use. In some languages, the symbol used is regarded as an operator (meaning that the assignment statement as a whole returns a value).
In Pascal enumerations are ordinal and parsed using ord(), succ() and pred() functions and are distinct from the array structure. In C, enumerations are in fact implemented as arrays and red becomes just a synonym for 0, green for 1, blue for 2, and nothing prevents a value outside this range to be assigned to the variable a.
Although UCSD Pascal actually expanded the subset Pascal in the Pascal-P kit by adding back standard Pascal constructs, it was still not a complete standard installation of Pascal. In the early 1990s, Alan Burns and Geoff Davies developed Pascal-FC, an extension to Pl/0 (from the Niklaus' book Algorithms + Data Structures = Programs ).
The "generic programming" paradigm is an approach to software decomposition whereby fundamental requirements on types are abstracted from across concrete examples of algorithms and data structures and formalized as concepts, analogously to the abstraction of algebraic theories in abstract algebra. [6]
Nested functions can be used for unstructured control flow, by using the return statement for general unstructured control flow.This can be used for finer-grained control than is possible with other built-in features of the language – for example, it can allow early termination of a for loop if break is not available, or early termination of a nested for loop if a multi-level break or ...
Object Pascal is an extension of the Pascal language that was developed at Apple Computer by a team led by Larry Tesler in consultation with Niklaus Wirth, the inventor of Pascal. [2] It is descended from an earlier object-oriented version of Pascal named Clascal , which was available on the Lisa computer.