What is a functional? [closed]

1. What are functional closures?
2. What is the difference between functions and closures?
3. Are closures functional programming?
4. What are closures in C#?

What are functional closures?

In programming languages, a closure, also lexical closure or function closure, is a technique for implementing lexically scoped name binding in a language with first-class functions. Operationally, a closure is a record storing a function together with an environment.

What is the difference between functions and closures?

In JavaScript, all functions work like closures. A closure is a function, which uses the scope in which it was declared when invoked. It is not the scope in which it was invoked. JavaScript 1.2 allows function definitions to be nested within other functions as well.

Are closures functional programming?

A closure is a function and its scope assigned to (or used as) a variable. Thus, the name closure: the scope and the function is enclosed and used just like any other entity.

What are closures in C#?

A closure as a first-class function in C#

A closure is a particular type of function that is intrinsically linked to the environment in which it is referenced. As a result, closures can use variables pertaining to the referencing environment, despite these values being outside the scope of the closure.