1.Declare Expression

1.Declare Expression:

Whenever there is change In Source Property Value ,Target Property Value Will be Updated Automatically Declare Expression Rules are Used To Perform Automatic Calculation

Scenario:

=>Calculate The Total Loss From Individual Loss Using Declare Expression

Total Loss=Loss1+Loss2+Loss3

=>Create 3 Properties 

=>Next  Create  Declare Expression 

Set .Total Loss= Value Of Loss1+Loss2+Loss3

Save The Declare Expression

Set  Property Behaviour =On change  

Event= Onchange

Refresh the Section 

=>Next Create Flow Action And Flow

=>After Save and Run The Flow