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Lisp by Namtap Tapchareon 49540511

Lisp, an iconic functional programming language, was developed by John McCarthy in 1958 and remains a powerful tool in the world of programming. Explore this language's history, structure, syntax, and examples.

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Lisp by Namtap Tapchareon 49540511

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  1. LispbyNamtap Tapchareon49540511

  2. Lisp Background • Lisp was developed by John McCarthy in 1958. • Lisp is derives from List Processing Language. • The first version of Lisp is called “Pure Lisp”.

  3. Description of Lisp • Lisp is a functional programming language. • Lisp is the second-oldest high-level programming language.

  4. Descendants of Lisp • Two dialects of LISP are now commonly used are Scheme and Common Lisp

  5. Scheme • Scheme is suited to educational application such as courses in functional programming and general introductions to programming

  6. Common Lisp • Common Lisp was created in an effort to combined the features of several dialects of Lisp.

  7. Language Structure • Lisp has only two kinds of data structure: atoms and lists. • Atoms are either symbols, which have the form of identifiers or numeric literals. • Lists are specified by delimiting their elements with parentheses.

  8. Syntax • Lisp's syntax is a model of simplicity.Program and data have exactly the same form: parenthesized lists. • For example : ( A B C D ) When interpreted as data, it is a list of four elements. When viewed as code, it is the application of the function named A to the three parameters B C and D.

  9. Examples • The following code defines a Lisp predicate function that take two lists as arguments and returns true if the two lists are equal, and NIL (false) otherwise. ( DEFUN equal_lists ( lis1 lis2 ) ( COND ( ( ATOM lis1 ) ( EQ lis1 lis2 ) ) ( ( ATOM lis2 ) NIL ) ( ( equal_lists ( CAR lis1 ) ( CAR lis2 ) ) ( equal_lists ( CDR lis1 ) ( CDR lis2 ) ) ) ( T NIL ) ) )

  10. Resources • Concepts of Programming Languages seventh edition by Robert W. Sebesta • http://en.wikipedia.org/wiki/Lisp_programming_language

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