Learning a New Language

Question 1

runtime environment

Answer 1

is a set of technologies that determine how to execute the code

Question 2

Declaring (in JavaScript)

Answer 2

stating a variable’s name with details about it’s scoping and mutability

Question 3

Assigning (in JavaScript)

Answer 3

creating a reference between a variable and an object

Question 4

let variable (in JavaScript)

Answer 4

A variable that is block-scoped and re-assignable.

Question 5

const variable (in JavaScript)

Answer 5

A constant variable. THis variable is block-scoped and read-only. Constants are the type of variable we’ll use most often.

Question 6

Declaration and Assignment (in JavaScript

Answer 6

In JavaScript, there are two distinct steps when dealing with variables:
declaration
assignment
Declaration is the step of stating a variable’s name, and what kind of variable it is. Different kinds of variables have different scope and re-assignment properties. We only need to declare a variable once. We never need to re-declare it.

Assignment is the step of giving a value to the variable, using the assignment operator =. Re-assignment also uses the assignment operator.

Question 7

let

Answer 7

let is one of three kinds of declared variables. let is A block-scoped variable.

Question 8

const

Answer 8

const is one of three kinds of declared variables. const is a block-scoped variable that is read-only. Ressignment raises a TypeError.

Question 9

var

Answer 9

DONT USE var. var is one of three kinds of declared variables. var is a variable without block scobing. If defined within a function, it will have scope throughout the entire function. If defined outside a function it will have global scope. DONT USE. BAD