Hi there,
On a survey I have three numeric fields of the same type (field A,B,C). I want the default value of the field C to be the total of A+B (C=A+.

What should I do?

Thank you.

Hi,

You can enter {A.NAOK + B.NAOK} as the default value for C - but C has to be in a separate (later) question group from A and B.

Cheers, Frank

Thank you for your response.
I tried it but it doesn't seem to work. I put the question C in another group after the other two questions A,B (on the same group) and I placed the code on the last tab of field C "Edit default answer values" but no result (0 zero is only displayed).

Well, I tried myself and it worked fine (using version 2.64.0+170307)!
Please find attached my sample survey using this "feature", maybe you can import it and have a look (if you are using this version - if not, I can also set up a sample for 2.6.4lts build 170202 if you wish).

Thank you. My version is 2.06+ Build 151215
Can you send me another sample for that version instead?

I tried worked but only if these fields C and A,B are in different page-view. Can this worked even they are on the same page?

If A or B are "Equation question type" then yes : only done in PHP, else it work on same page.

Remind : + is strange sometimes, better to use sum or join function to be sure.

Thank you. What do you mean by "Equation question type"?

We have a manual ...... best is to read the manual
manual.limesurvey.org/Question_type_-_Equation

thank you

I set up a sample survey in 2.6.4lts, I think you can import that in 2.06 without problems.
This should work!

Thank you, it worked fine.

Is there any way that this will also work if all these fields e.g. A,B,C will be in the same group and the survey is being displayed in one page instead of in separate?