Javascript challenge - finding number in a specific range

JavaScript
1

Tell us what’s happening:
Describe your issue in detail here.
Hi so I understand the logic behind the formula used in the challenge but I do not understand this part:

(max - min +1)
from what I’ve read on other posts its seems as if the min is being subtracted from the max before 1 is added to the min. Does BODMAS not apply in Javascript or am I confused by something

Please help .
Thanks.

  **Your code so far**


function randomRange(myMin, myMax) {
// Only change code below this line
return Math.floor(Math.random()*(myMax - myMin + 1)) + myMin;
// Only change code above this line
}

  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36

Challenge: Generate Random Whole Numbers within a Range

Link to the challenge:

2

Addition and subtraction execute from left to right, just like standard mathematical order of operations.
max - min + 1 is the same as max + 1 - min and 1 + max - min.

3

Okay I get that but if for example myMax=15 and myMin=5, I will get 11 from this order of operations, if math.random() gives me a number between 0 and 1(not inclusive), how is it that the formula never gives me 15 as an answer if we get 11 x 0.99 for example which the answer when put in math.floor returns 10 and we then add the myMin to it which is 5?

4

Unless the myMax can be an answer as well and not excluded?

5

The goal of this challenge is an inclusive range, so we want myMin and myMax to be possible outcomes.

1 Like
6

Oh okay that makes much more sense, Thank you very much. I thought the maximum was excluded from the possible outcomes and that’s why I couldn’t wrap my head around it.

7

I’m glad I could help. Happy coding!

8

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