es6-const-let

Question 1

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

Answer 1

Code block inside curly braces

Question 2

What does block scope mean?

Answer 2

means the code declared inside the curly braces, shadows the code outside

Question 3

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

Answer 3

block scoped

Question 4

What is the difference between let and const?

Answer 4

The const keyword creates block scoped variables who’s value can’t be reassigned

Question 5

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

Answer 5

beacause they are immutable which can be modified

Question 6

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

Answer 6

const when you don’t want the variable to be reassigned