Assignment Operators, Comparison Operators, Conditionals, and Ternaries

Question 1

What data type is this an example of?
let example = 'Hello';

Answer 1

String

Question 2

What data type is this an example of?
let example = 0;

Answer 2

Integer

Question 3

What data type is this an example of?
let example = true;

Answer 3

Boolean

Question 4

Rewrite the following as a Switch:

let test = 5;
if (typeof test === 'string') {
  console.log("It's a string!");
} else if (typeof test === 'number') {
  console.log("It's a number!");
} else if (typeof test === 'boolean') {
  console.log("It's a boolean!");
} else {
console.log("It's something else!")
}

Answer 4

switch (typeof test) {
  case 'string':
    console.log("It's a string!");
    break;
  case 'number':
    console.log("It's a number!");
    break;
case 'boolean':
    console.log("It's a boolean!");
    break;
  default:
    console.log("It's something else!");
    break;
}

Question 5

What will the following console log?

let test = '3';
if (test === 3){
  console.log('Yep!')
} else {
  console.log('Nope!')
}

Answer 5

Nope!

Question 6

What will the following console log?

let test = 3;
if (test === 3){
  console.log('Yep!')
} else {
  console.log('Nope!')
}

Answer 6

Yep!

Question 7

What will the following console log?

let test = '3';
if (test == 3){
  console.log('Yep!')
} else {
  console.log('Nope!')
}

Answer 7

Yep!

Question 8

Objects are ‘____’ - ‘____’ pairs

Answer 8

key-value

Question 9

Subtraction assignment operator

Answer 9

x -= 1

Question 10

Addition assignment operator

Answer 10

x += 1

Question 11

Multiplication assignment operator

Answer 11

x *= 1

Question 12

Division assignment operator

Answer 12

x /= 1

Question 13

Remainder (or modulus) operator

Answer 13

x %= 1

Question 14

Exponential assignment operator

Answer 14

x **= 1

Question 15

Equal comparison operator

Answer 15

==

Question 16

Strict equal comparison operator

Answer 16

===

Question 17

Not equal comparison operator

Answer 17

!=

Question 18

Strict not equal comparison operate

Answer 18

!==

Question 19

And comparison operator

Answer 19

&&

Question 20

Or comparison operator

Answer 20

||

Question 21

Write a ternary that console logs “It worked!” if a number is between 1 and 10 and console logs “It didn’t work” if it is not.

Answer 21

let num = 9;
(num < 11 &amp;&amp; num > 0) ? console.log('It worked!') : console.log('It didn\'t work.')

Question 22

Write an else if statement that checks the variable weather. If it is hot console log “Wear a t-shirt”, if it is cold console log “wear a coat” and if it is rainy console log “bring an umbrella”

Answer 22

let weather = 'cold';
if (weather === 'rainy'){
  console.log('Bring an umbrella')
} else if (weather === 'hot') {
  console.log('Wear a t-shirt')
} else if (weather === 'cold') {
  console.log('Wear a coat')
}