Solved
How does qualtrics give value to a sequence of variable in a loop?
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!
Best answer by TomG
It should be:
```
for (i = 0; i < data.length; i++) {
Qualtrics.SurveyEngine.setEmbeddedData("var"+(i+1), data[i]);
}
```
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
@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?
+27It should be:
```
for (i = 0; i < data.length; i++) {
Qualtrics.SurveyEngine.setEmbeddedData("var"+(i+1), data[i]);
}
```
@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?
+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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