What is the difference between scope and closure in JavaScript?

What is the difference between scope and closure in JavaScript?

Scope refers to the visibility of variables in certain parts of your code, while closure is a function that retains access to its lexical scope even when the function is executed outside that scope.

Can you give me an example of a closure?

Sure! Here's a simple example:

function outerFunction() {
    let outerVariable = 'I am outside!';
    function innerFunction() {
        console.log(outerVariable);
    }
    return innerFunction;
}

const myClosure = outerFunction();
myClosure(); // Outputs: I am outside!

How does scope affect variable accessibility?

Scope determines where variables can be accessed. For example, a variable declared inside a function cannot be accessed outside of it, which is known as local scope.

What are the types of scope in JavaScript?

In JavaScript, there are two main types of scope: global scope, which is accessible everywhere, and local scope, which is limited to the function or block where it is defined.