Question

Possible Duplicate:
java operator ++ problem

public class A {

public static void main(String[] args) {

    int nir = 5;
    nir = nir++;

    System.out.print(nir);
    }
}

Why is the output 5 and not 6?

Please don’t tell me what to do in order to get 6.. obviously I am able to get to 6, it’s just that the syntax looks fine to me and an explanation about what wrong with that will do better, thanks.

Answer 1

Because the expression nir++ evaluates to the old value of nir. So exp(nir++) is equivalent to:

int oldValue = nir;
nir = nir + 1;
exp(oldValue);

In your case that means:

int oldValue = nir;
nir = nir + 1;
nir = oldValue;

Which of course makes no sense because it basically does nothing.