Hi @RameshMukka
Thank you for posting.
When you initialize a variable, if the data type is String or Array, it can be reset to null. Unfortunately, if the data type is Float or integer, its value will be set to 0 by default, so it can not be reset to null.
You can use Condition to judge whether the value of the variable is 0, and proceed to the next step according to the judgment result.

Hope the content above may help you.
Best Regards
Lily