Hello Team,
Well, using the Empty expression is always always better than the NULL.
Let me show you how to achieve this, it is fairly simple.
Step 1 - Create a COMPOSE action and load it with your Value
Step 2 - Condition to Check whether the COMPOSE action is null/empty (in short has some data or not)
The Expression that you need to use is as below-
empty(outputs('Compose')) is equal to True
Now the condition checks if the Compose action (that is currently holding your dynamic content) is having some data or is Empty/Null.
If it is Empty it will give out True, if not it will give out False.
See output below-
This is always simple to execute using the Empty expression, never try to implement NULL, it is not a good idea and does not always give valid results, whereas with Empty results will always be spot on.
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