See if a for loop's counter has increased

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Java

I have a for loop and I have an if statement that will check if the counter increases. How would I check that?

Below I have given an example of what I had in mind. Thanks for your help in advance.

What I have tried:

for (int i = 0; i < 8; i++){
   if ( **counter 'i' has increased** ){
      //do stuff
   }
}