When are increments best used?

Answer 1

You can use increment operation while using the variable for other calculations. Then you would practically merge 2 statements into 1.

Sometimes it makes the code more readable, sometimes it doesn't.

Answer 2

To increase numbers.

int num = 0;

for(int i = 0; i < 5; i++) { // Increment
num++; // Increment
}

System.out.println(num);
// 5