Transcript scheme-49541196

Scheme Language
By Ratapong Satyapan
49541196
Scheme Background
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Scheme was developed in the 1975 by
- Guy L. Steele Jr.
- Gerald Jay Sussman
Scheme was originally called "Schemer“, like
another Lisp-derived languages such as Planner or
Conniver.
Scheme Description
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Scheme is the first dialect of Lisp to fully support
lexical scoping, first-class procedures, and
continuations.
Scheme is now a complete general-purpose
programming language, though it still derives its
power from a small set of key concepts.
Distinctive Characteristics
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It is a minimalist language. The language
standard is only about 50 pages, including all
semantics for the language core.
All data and functions share a common
namespace instead of Common Lisp
functions and data have separate
namespaces. So it can’t have same variable
and function name.
Design Goals
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Mainly used for mathematic calculation.
As a small langage with simple syntax and
semantics, Scheme is well suited to educational
applications, such as courses in functional
programming.
Scheme Characteristics
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Scheme function can be the values of expressions,
elements of lists, assigned to variables, and passed
as parameters.
Scheme is small size language.
Exclusive use of static scoping, an its treatment of
functions as first-class entities.
Examples
(define square
(lambda (n)
(* n n)))
(square 5)
; Output is 25
(square -200)
; Output is 40000
(square 0.5)
; Output is 0.25
(square -1/2)
; Output is 1/4
Contribution to Computer
Languages
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- -?
Useful Applications
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Mainly used for calculation and used in educational
applications, such as courses in functional
programming.
References
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http://en.wikipedia.org/wiki/Scheme_(programming_language)
http://www-swiss.ai.mit.edu/projects/scheme/
http://www.scheme.com/tspl2d/