I'm new to limesurvey and on version 2.50+ Build 160804. I've read the manual and other similar posts about using expression manager to create an equation with if statements to assign custom values to a question answer. I've followed the format used in the manual but I can't get my equation to work. I have a single numerical input question (code:Q2) that asks to fill in a time value in minutes. I would like to score this value based on the criteria:

<= 15 = 0
16-30 = 1
31-60 = 2
>60 = 3

I made a hidden equation question following Q2 which is called Q2score. 

Q2score = {if(Q2.NAOK<=15,0,if(Q2.NAOK>=16&&<= 30,1,if(Q2.NAOK >= 31&&<= 60,2,if(Q2.NAOK > 60,3))))}

I've tried various formatting changes to this equation without any success. I am consistently getting an error that there is an extra comma found in my function or that my if statement is not valid based on what I have written. I must be missing something. Any help or direction would be appreciated.

Hi,
there are several small issues.
1. If you have an equation that is called "Q2Score" you must not assign the equation to "Q2Score". {if(...)} is sufficient.

2. Your AND operation is incorrect syntax. As we learned at school: A>12 AND A < 25
In your case:
Instead of Q2.NAOK>=16&&<= 30
Q2.NAOK>=16 && Q2.NAOK<= 30

3. The IF-statement is IF(condition,true,false).
So the red parts are not necessary because this is the FALSE part of the previous condition.
{if(Q2.NAOK<=15,0,if(Q2.NAOK>=16 && Q2.NAOK<= 30,1,if(Q2.NAOK >= 31 && Q2.NAOK<= 60,2,if(Q2.NAOK > 60,3))))}
Sufficient is:
{if(Q2.NAOK<=15,0,if(Q2.NAOK<= 30,1,if(Q2.NAOK<= 60,2,3)))}

Joffm