Storyline Random Number - Rounding Method

Nov 06, 2020

Bridget O'Dell
By Bridget O'Dell

Prior to the addition of the Random Number variable,  I used JavaScript code to generate a random number in Storyline. Just as Storyline presents the random number as a whole integer (without decimals), I also used JavaScript to round the random number to a whole integer.

In JavaScript, there are 3 methods that can be used to round numbers to the nearest integer:

  • Math.round( ) rounds the number to the nearest integer (up or down)
  • Math.ceil( ) rounds the number up to the nearest integer
  • Math.floor( ) rounds the number down to the nearest integer

Question to Articulate Staff - are any of these methods used to round the random number variable in Storyline? If so, which method is used? I am trying to get a sense of the differences between generating a random number using the functionality in Storyline vs. custom JavaScript code.

Thanks in advance for your help!

2 Replies
Vincent Scoma
over 3 years ago11/10/20 at 2:47 pm (UTC)

Hi Bridget,

Happy to provide a bit more clarity here! 

While I can't share what exactly is happening behind the scenes or the "secret sauce," an outcome that is similar to the Random Number Variable functionality in Storyline is this JavaScript function: 

Math.floor(Math.random() * 10);

Instead of returning an integer between 0 and 1, the example above will return a random whole integer between 0 and 9. The outcome you see when using this example produces similar results to the Random Number Variable workflow in Storyline. 

I hope that helps and please let us know if you have any questions! 

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