i have got different value when i++ is before the statement and when i++ is after the statement

Question

var i = 0;
while ( i<=5) {
document.write(i + "<br />");
i++;
}
outputs = 0,1,2,3,4,5

var i = 0;
while ( i<=5) {
i++;
document.write(i + "<br />");

}

outputs 1, 2 , 3, 4, 5, 6.

why are the results different?

Answer 1

In the first case you increment i after you display it. So it starts at 0 since i is defined as 0.

In the second case i is incremented before you display it, so when you call document.write() it is at 0+1 = 1. It then starts at 1.

Answer 2

Yes much like it.

Answer 3

okay thanks you very much. is
it like.

var x = 3;
document.write(x++);
outputs 3.

var x = 3;
x++;
document.write(x);

outputs 4.