Help with Magic Ball SWITCH mode

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,
#1

I did this for the practice, however, the output is this one:
Hello, Paulina
Paulina asked: Will I get a job?
The eight ball answered:

And then nothing happens. It’s like it’s ignoring the whole cases. What am I doing wrong?
Thank you in advance for your help.
Paulina

let userName = "Paulina";
userName ? console.log(`Hello, ${userName}`) : console.log("Hello!");

const userQuestion = "Will I get a job?";
console.log(`${userName} asked: ${userQuestion}`);

const randomNumber = Math.floor(Math.random) * 8;

let eightBall = "";



switch (randomNumber) {
  case 0 :
    eightBall = "It is certain";
    break;
  case 1 :
    eightBall = "It is decidedly so";
    break;
  case 2 :
    eightBall = "Replay hazy, tray again";
    break;
  case 3 :
    eightBall = "Cannot predict now";
    break;
  case 4 :
    eightBall = "Do not count on it";
    break;
  case 5 :
    eightBall = "My sources say no";
    break;
  case 6 :
    eightBall = "Absolutly YES!";
    break;
  case 7:
    eightBall = "Signs point to yes";
    break;
}
console.log("The eight ball answered: " +(eightBall));
#2

Check how you’re invoking Math.random(). Right now it will not return a valid result (which is why your switch isn’t working).

MDN documentation almost always has useful examples, including in this case: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/random

1 Like
#3

OMG! it was just a small parenthesis- It drove me nuts the whole afternoon and through the night! thank you so much!

#4

I was too happy, too soon. I added the parenthesis, but only retrieves the first case, case 0, and not randomizing the rest.

#5

assuming you did this:

const randomNumber = Math.floor(Math.random()) * 8;

i see the problem. You first generate a random number between 0 and 1, which you then round down/floor. Which will be zero, which you multiply by 8. zero times eight will always be zero

#6

I understand that, but the exercise says " We need to generate a random number between 0 and 7.

Create another variable, and name it randomNumber. Set it equal to this expression, which uses two methods from the Math library."

#7

but if that is the plan, shouldn’t you first generate the desired random number before rounding down?

#8

could be something like let randomNumber = Math.random() * 8;
randomNumber = Math.floor()

#9

const randomNumber = Math.floor((Math.random()) * 8);

nevermind! got it! You are a genius. At first, I needed a parenthesis. Now I needed even more! Lol. TY so much! I’ve been trying since 6.AM! lol

1 Like
#10

you could even do:

Math.floor(Math.random() * 8);

which is easier to read

the important thing is to multiple first before rounding down. Otherwise, the value between 0 and 1 generated by random gets floored to zero right away, which won’t do you much good

of course you can even do this in two steps:

let randomNumber = Math.random() * 8;
randomNumber = Math.floor(randomNumber)

flooring the random number and updating the variable.

2 Likes
#11

Thank you! on to the next exercise! I’m so happy! Lol.

1 Like