WHILE loop?

[revitworkbench]

Can you do while loops in revit? If not, how do you track three variables? For example If 10<20, and 20<30, then C=1. the only problem is that C can have 4 values and logically can have more t...

[CoreyDaun · Accepted solution]

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michaelmead wrote:
"Can you do while loops in revit? If not, how do you track three variables? For example If 10<20, and 20<30, then C=1. the only problem is that C can have 4 values and logically can have more than one correct value based on the values of A and B...? any programers out there? Thanks!"

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A while loop is not possible within Revit's... less than stellar formulaic abilities. You can use a series of nested IF/THEN/ELSE statements. For example, this formula defines the Integer Value of "ParamC" based on the values of "ParamA" and "ParamB":

if(and(ParamA>20, ParamB>20), 35, if(and(ParamA<20, ParamB>20), 25, if(and(ParamA<20, ParamB<20), 15, 5)))

This formula checks the conditions and returns the results as listed below:

          IF AND...             THEN…
"ParamA" "ParamB"    "ParamC"=
   >20           >20                35
   <20           >20                25
   <20           <20                15
None of the above              5

Hope that helps!