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There are a variety of different programming paradigms (styles of writing programs). Some programming languages really only support a single paradigm while others may support several. Declarative programming has already been mentioned above.  Other paradigms include: procedural, functional, event-driven, object-oriented and automata-based.

There are a variety of different programming paradigms (styles of writing programs). Some programming languages really only support a single paradigm while others may support several. Declarative programming has already been mentioned above.  Other paradigms include: procedural, functional, event-driven, object-oriented and automata-based.

Languages associated with computers can also be classified as to whether or no they are Turing-complete, i.e. whether or not they are capable of expressing all possible computations (assuming enough time and memory). Examples of languages which are not Turing-complete include SQL for describing databases and markup languages such as HTML and XML.

Languages associated with computers can also be classified as to whether or not they are Turing-complete, i.e. whether or not they are capable of expressing all possible computations (assuming enough time and memory). Examples of languages which are not Turing-complete include SQL for describing databases and markup languages such as HTML and XML.

==Implementation of programming languages==

==Implementation of programming languages==