How can we assign a boolean value to null

Question

if the outageEligible (boolean) is false , then I need to null the value for outage(boolean) 
 if(rule!GBL_isnull(ri!outageEligible,false()) , a!save(ri!ouage,null(), a!save(null(),null())) 
 above is the code , I am using. But it is not working

Harshmodi · Answer

Hey, 
 a!save ( target , value) 
 In interface saveInto parameters, updates the target with the given value. Use a!save for each item that you want to modify or alter in a saveInto parameter. This function has no effect when called outside of a component (saveInto parameter). 
 According to your question, you can give this a try based on my understanding: 
 If outageEligible is false, save null in the outage rule input; otherwise, not 
 if(or(ri!outageEligible)=false,a!save(ri!outage,null),{})