 # FAQ: Code Challenges: JavaScript Fundamentals - Fix The Broken Code

This community-built FAQ covers the “Fix The Broken Code” exercise from the lesson “Code Challenges: JavaScript Fundamentals”.

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Although my code below seems valid, I’m trying to use console.log() to figure out what each individual die actually is (as suggested in Hint); however, when I do that, I get “ReferenceError: die1 is not defined at Object.”. Any ideas why?

I suppose that something is wrong in `test.js` file.

hello !!! I wanted to ask a question…Why we are multiplying by 6 and then adding 1 ? why we are not multiplying by 7 straight away?

Sorry, i think I found out by myself. so, if the random number will be floored to 0 - it is not existing on the dice. By adding 1 we make it real. Do i think correct ??

Wouldn’t Math.ceiling work to round the numbers up to 1-6, then you can get rid of the +1? That’s what I tried and it didn’t accept it.

1 Like

The ceiling of `0` is `0`, so it will not be a viable option.

``````x = Math.ceiling(Math.random() * 6)
``````

The solution set to the above is,

``````{ x | 0 <= x <= 6 }
``````

as in,

``````{0, 1, 2, 3, 4, 5, 6}
``````

whereas,

``````x = Math.floor(Math.random() * 6 + 1)
``````

has a solution set,

``````{ x | 0 < x <= 6 }
``````

as in,

``{1, 2, 3, 4, 5, 6}``
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I was confused and annoyed by this exercise. I couldn’t get anything to log until I did this:

``````const rollTheDice = () => {
let die1 = Math.floor(Math.random() * 6 + 1);
let die2 = Math.floor(Math.random() * 6 + 1);
return die1 + die2;
}

console.log(rollTheDice());
``````

The hint was not very helpful, as it recommended logging `die1`, which generated this error message…

/home/ccuser/workspace/js-challenge-fix-broken-code-i/main.js:9
console.log(die1);
^

ReferenceError: die1 is not defined
at Object. (/home/ccuser/workspace/js-challenge-fix-broken-code-i/main.js:9:13)
at Module._compile (module.js:571:32)
at Object.Module._extensions…js (module.js:580:10)
at Module.runMain (module.js:605:10)
at run (bootstrap_node.js:427:7)
at startup (bootstrap_node.js:151:9)
at bootstrap_node.js:542:3

1 Like

agreed, there is something wrong with the code in that aspect, but it should technically run because it is still a variable

Could I use Math.round() instead of Math.floor()?

The two are similar, but not the same. Floor never rounds up, but round will. It’s called the 5/4 rule… Up on 5, down on 4.

This can have the effect of extending the intended range. Instead of 10 random numbers, we could get 11, so no, they are not interchangeable.

I have the same codes. But Why every time I run the code, I get the same number? Isn’t it supposed to change since the dies are randomly selected?