Can someone explain to me? JS Increment Decrement

Question

Code 1:

<script>
var x = 1;
for(;x<6;x+=2){
x=x*x;
}
document.write(x)
</script>

here in this code, even after the condition is false, the part that increments is executed last time.

--###---####----#####-----#####------######
Code 2:

<script>
var x = 0;
for(;x<8;x++){}
document.write(x);
for(;x>4;x-=2){}
document.write(x);
</script>

here in this code, even after the condition is false, the incrementing part is no longer executed.

Why does it happen? or am I wrong?

Answer 1

thanks, but the problem was not about that. I was able to find a solution. I was confusing the order in which the parts are evaluated in the for, the correct form would be:

1. Initializes the condition.
2.Check the condition.
3. Execute what you have in your body.
4.increment the variable.

Doing this way the variable x of the first code gets value 11.;)

I was doing it wrong way:

1. Initializes the condition.
2.Check the condition.
3. increment the variable
4.Execute what you have in your body.

Answer 2

Hey buddy ,
I guess it's related to the process of adding here's example
x++ //which means increase after this step execution not now
++x //which means add in this moment don't wait

you can test it more by for example
var a = 2;
var b = a++;
//b = 2
//a = 3

so what happens in Code 1 that it increment at the same time so the result of i already increased , but in the second not .