How to use Compare Value of operations if variable is empty

Q: How to use 'Compare Value' of operations if variable is empty?

A: You want to compare values, but this values is empty, then one side put you want to compare it, the other side don't put anything. Like this screenshot.

{{test.B(2)}} is empty and the other side is empty too.

• Reference link: Compare Value
• Variable's form is {{GroupName.VariableName(Index number)}} like {{group.A(1)}} 
• If you want to check your variable then use operation 'View variables'.