ES6-Const-Let

Question 1

What is a code block? What are some examples of a code block?

Answer 1

A code block is a chunk of code bounded by {}

Question 2

What does block scope mean?

Answer 2

block scope restricts the variable that is declared inside a specific block, from access by the outside of the block.

Question 3

What is the scope of a variable declared with const or let

Answer 3

Block Scope

Question 4

What is the difference between let and const?

Answer 4

let variable values can be updated while const variables cannot

Question 5

Why is it possible to .push() a new value into a const variable that points to an Array?

Answer 5

You cannot set a new value to a const variable but if the const variables value is an array or object you can update the elements or properties of that const array or object

Question 6

How should you decide on which type of declaration to use?

Answer 6

It depends on whether or not the variable you are declaring will have its values change.