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 block of code that is ran when a conditional is met.

Question 2

What does block scope mean?

Answer 2

The variable is only effective in the scope 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’s value can be reassigned and const’s cannot.

Question 5

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

Answer 5

Because it’s not directly changing the variables value.

Question 6

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

Answer 6

If you’re going to change the value of a variable, use let. If you’re stating something to be almost permanent, then use const.