can anytone tell me why the answer is 1??thanks in advance :)

Question

var a =3;
var b = 2;
var z =(++b+a--)%5;
document.write(z);

Answer 1

++b increments the value of b before evaluating it.
a-- evaluates the value of a before decrementing it.
% gives the remainder of the euclidian division.
So z is equals to (3+3)%5, ie 1.

Answer 2

thank you