In JavaScript, objects and functions are also variables. Scope determines the accessibility of variables, objects, and functions from different parts of the code.

What is a function scope?

Function Scope: When a variable is declared inside a function, it is only accessible within that function and cannot be used outside that function. Block Scope: A variable when declared inside the if or switch conditions or inside for or while loops, are accessible within that particular condition or loop.

What are the scopes available in JavaScript?

There are three types of scope in JavaScript — 1) Global Scope, 2) Function Scope, and, 3) Block Scope.