Closure

A closure is a concept where a function will return another function in order to create a private scope.

In JavaScript it is a powerful concept that allows a function to remember and access its lexical scope even when it is executed outside of that scope.

In simpler terms, a closure is created when an inner function has access to its parent function's variables, parameters, and even the parent function itself.

The inner function forms a closure, capturing and preserving the state of its surrounding environment.

This enables the inner function to continue referencing and using those variables and values, even after the parent function has finished executing.

Closures are often used to create private variables, encapsulate functionality, and maintain data integrity in JavaScript applications.

They are an essential feature for advanced programming techniques and play a crucial role in functional programming paradigms.

Understanding closures allows developers to write more efficient and modular code, enhancing the flexibility and robustness of their JavaScript applications.