PLEASE HELP: What do these "Actions" do?

PLEASE HELP: What do these "Actions" do?

Can someone PLEASE explain what the following actions do?
Please be as detailed as possible.

"For Each Integer A, Do Multiple Actions"
"For Each Integer B, Do Multiple Actions"
"For Each Integer Variable, Do Multiple Actions"

What’s the difference between "Each Integer A" and "Each Integer B"?

Also what’s the difference between "Each Integer B" and "Each Integer Variable"?

These are Loop actions. What it basically does is sets a value to the maximum and minimum value, starts at the minimum and counts up until it reaches the max.

Integer A/B/Variable are all the same, its just so you can put them inside each other, because a Loop A Inside a Loop A will replace the original one and only some of the actions will do their thing.

Loop Integer Variable is so you can use many many loops, by using any integer variable that you created in your map.

Thanks, I understand it a bit now, would you please (Or somebody else) mind to give an example?