Declarative vs. Imperative. A programming paradigm is a fundamental style of computer programming. There are four main paradigms: imperative, declarative, functional (which is considered a subset of the declarative paradigm) and object-oriented.

Declarative vs Imperative. Declarative Programming is like asking your friend to paint your House. You don’t care how they clean it,what colour they use to paint,How many resources they used to complete it`. //Declarative For Searching element from an array array.find(item) The opposite of declarative is imperative.

The main difference is between imperative and declarative. Functional is a particular kind of declarative. C, C++, Java, Javascript, BASIC, Python, Ruby, and most other programming languages are imperative.

2013年7月2日 · Declarative programming - What should be done. Imperative programming - How what you want should be done. Declarative programming requires developers to say what is to be done. Imperative programming requires developers to define step by step how code should be executed. Example: LINQ in C# is declarative.

2009年3月2日 · Lets handle imperative vs. declarative first. Definition of declarative expression. The only attribute that can possibly differentiate a declarative expression from an imperative expression is the referential transparency (RT) of its sub-expressions. All other attributes are either shared between both types of expressions, or derived from the RT.

2009年10月25日 · The main difference between two programming languages are, In procedural programming, we tell the computer how to solve the problem and in declarative programming, we tell the computer what problem we want solved.

Here is the difference: Imperative: Start; Turn on your shoes size 9 1/2. Make room in your pocket to keep an array[7] of keys. Put the keys in the room for the keys in the pocket. Enter garage. Open garage. Enter Car.... and so on and on ... Put the milk in the refrigerator. Stop. Declarative, whereof functional is a subcategory:

2016年7月22日 · For full disclosure, I'm moving right over to the view that "good" OOP (OOP properly understood) is fundamentally declarative. The more imperative or procedural it becomes the more you're missing the point. And there ideally shouldn't be much (if any) mixing of the two approaches. This view won't go down well with many people.

2010年12月9日 · Very true, I'll delete the "(sometimes 'imperative programming')" aside. Procedural is indeed a subset of imperative. It is quite possible to program imperatively without "procedures" in some languages. However, the key difference between a "procedure" and a "function," I believe, is that the former is imperative. That's what I meant. –

2015年10月29日 · In an imperative programming language you tell the compiler what you want to happen step by step, whereas in a declarative language you write code which describes the result but not necessarily how to achieve the desired result. However, I wan't to know the optimisations of using either type of programming language.