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BVGContentQueen
Participating Frequently
May 23, 2022
Answered

Why can't Captivate Multiply?

As I try to turn decimals into a percent by multiplying decimals by 100, I get this funkiness. 

 

Expression = var_a * 100

var_a = .07

 

should give me 7 correct? Instead it gives me this...

 

WHY??????????

 

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    TLCMediaDesign
    TLCMediaDesignCorrect answer
    Inspiring
    May 24, 2022

    Technically is better to use Math.round instead of toFixed(0) as toFixed returns a string and you could not do any further calculations with the result of toFixed.

     

    Also, it has nothing to do with Captivate being funky, it is JavaScript that cannot accurately represent certain numbers in floating point binary, so you get those results. 

     

    So with JavaScript just add this to your action:

     

    Since you do not show what variable is being set with the result of your expression, I'll just use the variable "result"

    Math.round(window.result);

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    5 replies

    TLCMediaDesign
    TLCMediaDesignCorrect answer
    Inspiring
    May 24, 2022

    Technically is better to use Math.round instead of toFixed(0) as toFixed returns a string and you could not do any further calculations with the result of toFixed.

     

    Also, it has nothing to do with Captivate being funky, it is JavaScript that cannot accurately represent certain numbers in floating point binary, so you get those results. 

     

    So with JavaScript just add this to your action:

     

    Since you do not show what variable is being set with the result of your expression, I'll just use the variable "result"

    Math.round(window.result);

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      Lilybiri
      Lilybiri
      Legend
      May 24, 2022

      Thanks, David. I took this from an example where no further calculations were needed, since it was an end result. OP used the variable var_a.

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      BVGContentQueenAuthor
      Participating Frequently
      September 26, 2022

      Thank you both! I ended up using javascript toFixed(0) because it was just a display issue. I will use Math.Round when I need do more math to it.

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      Lilybiri
      Lilybiri
      Legend
      May 24, 2022

      You cannot format the number of decimals in Captivate, you need to do that using JS. I have some examples here:

      http://blog.lilybiri.com/percentage-progress-indicator-non-linear-course-solution-1

      In your case you could choose to add those lines to your advanced action:

      var perc = window.cpAPIInterface.getVariableValue(“var_a”);  window.cpAPIInterface.setVariableValue(“var_a”,toFixed(0));

      Translate
        BVGContentQueenAuthor
        Participating Frequently
        September 26, 2022

        I ended up writing it like this:
        window.cpAPIInterface.setVariableValue("var_bonusVolumeFormat", var_bonusVolume.toFixed(0));
        But your way might be easier to understand.

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