Decrement operator

Question

public class Decrement
{
public static void main(String[] args)
{
int n = 7;
n++;
System.out.println("n == " + n);
n--;
System.out.println("n == " + n);
}
}

n == 8
n == 7

I'm confused.
To decrement he use my previous value? Or is another rule?

Answer 1

In your code, n is initialized with a value of 7. You increment n to 8 and output its value. Then you decrement n (restated, n = 8 - 1) to 7 and output its value again.

n++ is the same as n = n + 1
n-- is the same as n = n - 1