#closure #coding #programming
This video explains the concept of closure in JavaScript. A closure is a principle where local variables or parameters of a function that has finished execution remain in memory. When a function within a function refers to the external function's variables, these variables are not deleted from memory but are retained even after the external function has finished execution. With this, you can implement features such as a counter that increases by a set value each time it is executed. Also, closures can be used in all programming languages that support first-class functions, nested functions, and lexical scoping. The point is that understanding closures allows you to have features similar to private fields and use memory efficiently.
