What is scope in JavaScript?

Scope is the area of the code where a variable is visible.

• Global scope: declared outside all functions, visible everywhere.
• Function scope: declared inside a function, visible only there.
• Block scope: declared with let or const inside { }, visible only in that block.

let g = "global";
function f() {
  let l = "local";
  console.log(g, l);
}
f();
console.log(typeof l);

Output:

See JavaScript Scope.

• Previous Interview Question
• Next Interview Question

---

Tutorials
No Content Found.

Exercises & Assignments
No Content Found.

Interview Questions & Answers
No Content Found.