If else if statement for variable to another variable

Question

I need to have a Google Form that returns the result of variable2 depends on the result of variable1. The code runs successfully but the variable 2 does not change.

No matter what the value of BranchChoices is, the result will always be LN2. Did I missed out anything?

   item = "Branch"; 
   var bN2 =  ["A", "B", "C"]
   var bN1 = ["1", "2"]
   var bN3 = ["1", "2", "A", "B", "C"]
   var BranchChoices = bN3;  
   form.addMultipleChoiceItem()  
       .setTitle(item)  
       .setChoiceValues(BranchChoices)  
       .setRequired(true); 
 
   item = "Location";   
   var LN1 = ["I"];  
   var LN2 = ["P"]; 
   var LN3 = ["I:", "P:"]; 
   
   if(BranchChoices = bN2) {
     var LocationChoices = LN2;
     } else if (BranchChoices = bN1) {
     var LocationChoices = LN1 ;
     } else if (BranchChoices = bN3) {
     var LocationChoices = LN3 ;
     }

   form.addMultipleChoiceItem()  
       .setTitle(item)  
       .setChoiceValues(LocationChoices)  
       .setRequired(true);

Answer 1

The difference between assignment and conditional

This is an assignment if(BranchChoices = bN2) {

This is probably what you really want if(BranchChoices == bN2) {

You made the same error in several places fix them all. There may be other errors. You code is incomplete.