Both ++i and i++ increment the value of the variable i by 1. The key difference is in the order of evaluation. ++i (pre-increment) increments the value of i before its current value is used, while i++ (post-increment) uses the current value of i and then increments it.Answer: Both ++i and i++ increment the value of the variable i by 1. The key difference is in the order of evaluation. ++i (pre-increment) increments the value of i before its current value is used, while i++ (post-increment) uses the current value of i and then increments it.