es6 - const - let

Question 1

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

Answer 1

the code between curly braces - if statements function blocks

Question 2

What does block scope mean?

Answer 2

that the variable exists inside of the curly braces it was declared in.

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

you can re-assign a value to let

Question 5

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

Answer 5

because you can adjust the values of a property of what was assigned to a const but not what was assigned itself

Question 6

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

Answer 6

use const unless you cant and then use let