Javascript clousers

JavaScript Closures

JavaScript variables can belong to:

The local scope or The global scope

Global variables can be made local (private) with closures.

Closures makes it possible for a function to have "private" variables.

Local Variables
A local variable is a "private" variable defined inside a function.

A function can access all variables in the local scope.

Example
a is a local variable defined inside the function:

function myFunction() {
let a = 4;
return a * a;
}

Global Variables
A global variable is a "public" variable defined outside a function.

A function can access all variables in the global scope:

Example
a is global variable defined outside the function:

let a = 4;
function myFunction() {
return a * a;
}