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Hello,

I want to calculate score of a questionnaire and used Equation quastiontype for this. Each item in this questionnaire have an special weight so I used this equation:

{G12Q61_SQ005.value*22.37+G12Q61_SQ013.value*12.57+G12Q61_SQ022.value*27.26+G12Q61_SQ029.value*16.1+G12Q61_SQ033.value*21.7}

When every value equal to 1, total score must be 100 but result of limesurvey is 100.00000000000001.

What am i doing wrong? Could you help me?

 

Hi,

What am i doing wrong? 

Nothing.

Could you help me?

No.

Why?
This is an issue of floating point arithmetic.

You may read here.
[url] floating-point-gui.de/ [/url]

Joffm

Since this is the result of floating point arithmatics, I would round the result like this:

{round((G12Q61_SQ005.value*22.37+G12Q61_SQ013.value*12.57+G12Q61_SQ022.value*27.26+G12Q61_SQ029.value*16.1+G12Q61_SQ033.value*21.7),0)}

Thank you very much.

tammo wrote:

Since this is the result of floating point arithmatics, I would round the result like this:

{round((G12Q61_SQ005.value*22.37+G12Q61_SQ013.value*12.57+G12Q61_SQ022.value*27.26+G12Q61_SQ029.value*16.1+G12Q61_SQ033.value*21.7),0)}

We use ,0 as precission so i used 2.