Checking For Null Value In MS Flow Condition

This blog tells when using conditional blocks in MS Flow, how should we check for null value for any SharePoint field or workflow variable.

This blog is about how to check for null value condition in MS Flow. The approach is quite simple but it may take a long time since anyone will try to compare the workflow variable or SharePoint field value with 'NULL'.
 
But MS Flow cannot recognize the value 'null' because 'null' is actually an expression for MS FLow. Please find the below screenshot for better understanding.
 
Failed Condition 
Checking For Null Value In MS Flow Condition
 
Success Condition
 
(Choose 'null' from expression tab)
 
Checking For Null Value In MS Flow Condition