if statement always returning false parameter

[SteveBrewer]

I have a running if function that keeps returning the false parameter. This is from a select multiple field type, and I am not sure how to proceed. I have tried checking the options. Part of me wonders if its because I need to incorporate a select function and have tried but it always breaks everything. Anyone else have this problem and fixed it?

Here is list of choices and if.

Lower intertidal zone

Mid intertidal zone

Upper intertidal zone

Supra tidal zone

if(${tdzn}='Lower intertidal zone', 'LI', if(${tdzn}='Mid intertidal zone', 'MI', if(${tdzn}='Upper intertidal zone', 'UI', if(${tdzn}='Supra tidal zone', 'SU', 'null'))))

[Raul]

The if statement formatting looks good, are you sure you're making your comparisons against the *coded* value of 'tdzn'?

[JenniferAcunto]

It's not working because the question type is a Select Multiple. Which means the data in that field will have multiple comma separated values, so unless someone only selected 1 specific choice, ${field}= will never be true. 

What you want is to check if a specific option has been selected in a field using selected(${question_one}, 'a').

Also, you need to be using the name field for your options, not the value. Spaces are not allowed in a Select Multiple name so it appears you are using the value. 

Your if statement should look something like this:

if(selected(${tdzn},'Lower_intertidal_zone'), 'LI', if(selected(${tdzn}, 'Mid_intertidal_zone'), 'MI', if(selected(${tdzn}, 'Upper_intertidal_zone'), 'UI', if(selected(${tdzn}, 'Supra_tidal_zone'), 'SU', 'null'))))