explain the concept of closures in javascript. in javascript

index.tsx
In JavaScript, closures are functions that have access to their own scope, as well as the outer function's scope even after the outer function has finished executing. This means that a closure can "remember" and access variables defined in its outer scope.

Here's an example to explain closures in JavaScript:

function outerFunction() {
  let outerVariable = 'I am from the outer function';

  function innerFunction() {
    let innerVariable = 'I am from the inner function';
    console.log(outerVariable); // Accessing outerVariable from the outer scope
    console.log(innerVariable); // Accessing innerVariable from the inner scope
  }

  return innerFunction;
}

const closureExample = outerFunction();
closureExample();

In this example, the innerFunction has access to the outerVariable declared in the outerFunction even after outerFunction has finished executing. This is possible due to closures in JavaScript.
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