JavaScript Scope Explained Simply

Scope refers to the current context of code, which determines the accessibility of variables to JavaScript.

const course = "JavaScript";

function showLesson() {
  const topic = "Scope";
  if (true) {
    const message = course + ": " + topic;
    console.log(message);
  }
  console.log(typeof message);
}
showLesson();
console.log(typeof topic);

OutputJavaScript: Scope undefined undefined

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