How does qualtrics give value to a sequence of variable in a loop? | XM Community
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How does qualtrics give value to a sequence of variable in a loop?

  • 17 November 2019
  • 5 replies
  • 22 views
R
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Hi, I would like to give values to a sequence of global variable in qualtrics.

To illustrate, I have set var1, var2, var3 in the survey flow. and I have define data=['apple', 'banana', 'orange'] in the javascript. I am using the following script.

Qualtrics.SurveyEngine.setEmbeddedData('var1', data[0]);
Qualtrics.SurveyEngine.setEmbeddedData('var2', data[1]);
Qualtrics.SurveyEngine.setEmbeddedData('var3', data[2]);

Is there a way to do it in a loop? For example, I am thinking

for (i = 0; i < rd_option1.length; i++) {
Qualtrics.SurveyEngine.setEmbeddedData('var+i', data[i]);
}
But it seems like qualtrics does not read 'var+i' properly in a loop? Is there a way to solve it?

Thank you very much!
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Best answer by TomG 18 November 2019, 13:35

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5 replies

Z
Hi @Rui ,

You're almost there, just remove the quotes around var+i

```javascript
Qualtrics.SurveyEngine.setEmbeddedData(var+i, data[i]);
```

Please give it a try and let us know if it works, thanks.

Zhen
R
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@Zhen Thank you for your reply. Unfortunately, it does not work. The code does not assign value from data[i] to vari. Does it work for you?
TomG
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It should be:
```
for (i = 0; i < data.length; i++) {
Qualtrics.SurveyEngine.setEmbeddedData("var"+(i+1), data[i]);
}
```
R
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@TomG Thanks for your answer. Please let me take the chance to ask for something general. e.g. I want to define var11,var12,var21,var22 with data1, data2, how should I define the variable in the loop? I tried the following:

for (j = 1; j<4; i++) {
for (i = 0; i < data.length; i++) {
Qualtrics.SurveyEngine.setEmbeddedData("var"+j+(i+1), data+j[i]);
}
}

but it is returning error. Would you have a good idea?
TomG
Rank
Userlevel 7
Badge +27
> @Rui said:
> @TomG Thanks for your answer. Please let me take the chance to ask for something general. e.g. I want to define var11,var12,var21,var22 with data1, data2, how should I define the variable in the loop? I tried the following:
>
> for (j = 1; j<4; i++) {
> for (i = 0; i < data.length; i++) {
> Qualtrics.SurveyEngine.setEmbeddedData("var"+j+(i+1), data+j[i]);
> }
> }
>
> but it is returning error. Would you have a good idea?
I'm not sure what you are trying to do. Are data1 and data2 arrays?

Anyway, in your j for loop you have to increment j not i. If data1 and data2 are arrays, then data+j[i] is the wrong syntax.

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