What does it means; for example: i++ or i--? Note : i as variable.

Question

and what that's using for?

Answer 1

Increment & Decrement operator

https://www.sololearn.com/learn/Java/2141/?ref=app

Answer 2

"i-- " is the same as "i-1"
And "i++" is the same as "i+1".
It is using in cycles "for" for to simplify the code.
example: for(int i, i<10, i++)
It's more convenient than "i+1"

Answer 3

Marcus McKenzie Thank you so much