Comparing values from two iteration

In a loop (For each tag) I want to compare an extracted value with the same value from the previous iteration, so I can assign one value to a variable if the two extractions are egual and an another value if not.
How to do that?

Hi Jacob,

Please find the below demo..
You can assign a global variable and should assign '0' in initially before the for each tag,
in the first iteration you can extract the value to the local variable. Then you can add one branch.
while iteration change, you can check the condition, based on the condition you can proceed.

Hope you understood the logic.

Thank you

Hi Shyam

Thanks for your answer. 
In think I understand the logic and wiil try it out.