Functional programming is a buzz word these days which is essentially a subset of declarative programming. LINQ in C# language is an element of functional programming when the language itself is imperative by nature. So C# becomes sort of hybrid going by that definition. –

Common declarative languages include those of database query languages (e.g., SQL, XQuery), regular expressions, logic programming, functional programming, and configuration management systems. So LINQ, as a functional syntax, is definitely a declarative method, but Attribute classes in C#, as a configuration tool, are declarative too.

Oct 25, 2009 · There are several sub-paradigms of the declarative programming paradigm, such as the functional or the logic programming paradigms. In the declarative programming paradigm, you describe a result or a goal, and you get it via a "black box". The opposite of imperative. Examples of programming languages which support the declarative programming ...

This answers make it sound like declarative programming is either a property of a language or simply a style for writing computer programs. Some languages like SQL are designed to be declarative. But nothing should stop you from writing declarative code in so-called imperative languages like Java, etc.

Mar 2, 2009 · As (strictly defined) functional programming means programming by defining side-effect free mathematical functions so it is a form of declarative programming but it isn't the only kind of declarative programming. Logic Programming (for example in Prolog) is another form of declarative programming. It involves computing by deciding whether a ...

Aug 30, 2012 · Declarative programming is mostly about inventing domain-specific languages (DSLs) and then programming in these sublanguages. Haskell is a very good choice for that particular style. In Haskell virtually all domain-specific languages are embedded in …

Sep 17, 2012 · A declarative language requires you to code for what you want to happen rather than in an imperative language where you code how the computation should be done. In general this means that a declarative language does not allow for side-effects, whereas imperative languages almost require coding with side-effects.

Jul 12, 2017 · Based on these definitions one could say that functional programming is a subset of declarative programming. In a practical sense however if we follow the strict definitions, no programming language nowadays is purely, and un-ambigously declarative or functional. One can however say that Haskell is more declarative than Java.

Jul 20, 2009 · No, SQL is not a functional language. The paradigm is somewhat different. Note that there are other types of declarative programming languages other than functional - the canonical example being logic programming and PROLOG. Technically, Relational Algebra (the theoretical basis of SQL) is not actually turing complete.

Apr 15, 2017 · Almost any high-level language is "declarative" in some way, and there are languages that support "declarative programming" better than Haskell does. In C, for example, enums and even the switch can be "declarative", if you use it in a certain way. Much further in the "declarative" direction is Prolog, and you could write programs in a ...