Execution proceeds by attempting to find values for the variables which satisfy all declared constraints.
This syntax originated with BCPL (1966), and was popularized by C. Many curly bracket languages descend from or are strongly influenced by C. Examples: Dataflow programming languages rely on a (usually visual) representation of the flow of data to specify the program.
Examples of dataflow languages include: Data-oriented languages provide powerful ways of searching and manipulating the relations that have been described as entity relationship tables which map one set of things into other sets.
Client-side embedded languages are limited by the abilities of the browser or intended client.
A large number of other languages, such as Erlang, Scala, Perl, Ring and Ruby can be adapted (for instance, by being made into Apache modules).
A wide variety of dynamic or scripting languages can be embedded in compiled executable code.
Basically, object code for the language's interpreter needs to be linked into the executable.
Source code fragments for the embedded language can then be passed to an evaluation function as strings.
Application control languages can be implemented this way, if the source code is input by the user.
Here is a list of programming languages that follow the imperative paradigm: Known as REPL - Interactive mode languages act as a kind of shell: expressions or statements can be entered one at a time, and the result of their evaluation seen immediately.
Macro languages may be restricted to acting on specially labeled code regions (pre-fixed with a # in the case of the C preprocessor).
Alternatively, they may not, but in this case it is still often undesirable to (for instance) expand a macro embedded in a string literal, so they still need a rudimentary awareness of syntax.
The goal is to allow programmers to use the best tool for a job, admitting that no one paradigm solves all problems in the easiest or most efficient way.
Class-based object-oriented programming languages support objects defined by their class.
There are exceptions where single dispatch methods are generic functions (e.g. Bigloo's object system).
Procedural programming languages are based on the concept of the unit and scope (the data viewing range) of an executable code statement.
A procedural program is composed of one or more units or modules, either user coded or provided in a code library; each module is composed of one or more procedures, also called a function, routine, subroutine, or method, depending on the language.
Such language forms usually consist of special data types, like "color" and "normal".
They provide both higher hardware abstraction and a more flexible programming model than previous paradigms which hardcoded transformation and shading equations.
This gives the programmer greater control over the rendering process and delivers richer content at lower overhead.
These languages assist with generating lexical analyzers and parsers for context-free grammars.
It is most commonly used in intermediate components of more complex super-systems in order to adopt internal results for input into a succeeding processing routine.
Computer scientist Niklaus Wirth designed and implemented several influential languages.