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In programming languages, a type system is a logical system comprising a set of rules that assigns a property called a type to the various constructs of a computer program, such as variables, expressions, functions or modules. These types formalize and enforce the otherwise implicit categories the programmer uses for algebraic data types, data structures, or other components (e.g. "string", "array of float", "function returning boolean"). The main purpose of a type system is to reduce possibilities for bugs in computer programs by defining interfaces between different parts of a computer program, and then checking that the parts have been connected in a consistent way. This checking can happen statically (at compile time), dynamically (at run time), or as a combination of both. Type system

Attributes	Values
rdf:type	Thing book
rdfs:label	Type system (en)
rdfs:comment	In programming languages, a type system is a logical system comprising a set of rules that assigns a property called a type to the various constructs of a computer program, such as variables, expressions, functions or modules. These types formalize and enforce the otherwise implicit categories the programmer uses for algebraic data types, data structures, or other components (e.g. "string", "array of float", "function returning boolean"). The main purpose of a type system is to reduce possibilities for bugs in computer programs by defining interfaces between different parts of a computer program, and then checking that the parts have been connected in a consistent way. This checking can happen statically (at compile time), dynamically (at run time), or as a combination of both. Type system (en)
rdfs:seeAlso	Dynamic programming language
sameAs	Type system Type system
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Subject	Articles with example C code Data types Program analysis Type systems Type theory
gold:hypernym	Collection
prov:wasDerivedFrom	http://en.wikipedia.org/wiki/Type_system?oldid=1061035801&ns=0
Wikipage page ID	199701 (xsd:integer)
page length (characters) of wiki page	56803 (xsd:nonNegativeInteger)
Wikipage revision ID	1061035801 (xsd:integer)
has abstract	In programming languages, a type system is a logical system comprising a set of rules that assigns a property called a type to the various constructs of a computer program, such as variables, expressions, functions or modules. These types formalize and enforce the otherwise implicit categories the programmer uses for algebraic data types, data structures, or other components (e.g. "string", "array of float", "function returning boolean"). The main purpose of a type system is to reduce possibilities for bugs in computer programs by defining interfaces between different parts of a computer program, and then checking that the parts have been connected in a consistent way. This checking can happen statically (at compile time), dynamically (at run time), or as a combination of both. Type systems have other purposes as well, such as expressing business rules, enabling certain compiler optimizations, allowing for multiple dispatch, providing a form of documentation, etc. A type system associates a type with each computed value and, by examining the flow of these values, attempts to ensure or prove that no type errors can occur. The given type system in question determines what constitutes a type error, but in general, the aim is to prevent operations expecting a certain kind of value from being used with values for which that operation does not make sense (validity errors). Type systems are often specified as part of programming languages and built into interpreters and compilers, although the type system of a language can be extended by optional tools that perform added checks using the language's original type syntax and grammar. (en)
foaf:isPrimaryTopicOf	http://en.wikipedia.org/wiki/Type_system
is rdfs:seeAlso of	Container (abstract data type)
is typing of	*Lisp .QL
is Wikipage redirect of	Unified type system Static type-checking Static type checking Static typing Statically typed Run-time type checking Runtime type checking Dynamic type checking Dynamic typing Dynamically typed Dynamically typed language Optional static typing Optional type systems Existential type Type checking Existential types Optional typing Static-typing (programming languages) Static type Static type system Static types Statically-typed Statically-typed programming language Statically typed language Statically typed programming language Compile-time type checking Computational type system Dynamic data typing Dynamic type Dynamically-typed language Dynamicly typed Type-checker Type-checking Type checker Type equivalence Type error Type systems Typechecker Typechecking Typed (programming languages) Typed language Typing discipline
is Link from a Wikipage to another Wikipage of	Flix (programming language) Flow-sensitive typing Flowgorithm Foreign function interface Formal methods Formal verification

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