What is the scope of const in JavaScript?

What is the scope of const in JavaScript?

In JavaScript, the scope of a variable declared with const is block-scoped, meaning it is only accessible within the block it is defined.

Can you give me an example of block scope with const?

Sure! Here's an example:

if (true) {
    const x = 10;
    console.log(x); // 10
}
console.log(x); // ReferenceError: x is not defined

What happens if I try to reassign a const variable?

If you try to reassign a const variable, you'll get a TypeError. For example:

const y = 5;
y = 10; // TypeError: Assignment to constant variable.

Are const variables hoisted in JavaScript?

Yes, const variables are hoisted to the top of their block, but they cannot be accessed until they are declared, leading to a "temporal dead zone."