Why is the output 11 & not 9?

Question

var x = 1;

for(; x < 6; x += 2) {
x = x * x;
}
alert (x);

Answer 1

Dont forget that x+=2 will run at end of every iteration

start with x=1
1) x*x=1 x+2= 3 (3<6 continue)
2) x*x=9 x+2=11 (11 > 6 stop here)
stop

Answer 2

First round:
1 * 1 = 1
2nd Round:
3*3 = 9
Then x is incremented by 2 and the condition is checked:
x < 6 ? --> False, x is 11 now.

Answer 3

I am use this form for debug my codes ,inclusive used gives last answer.

var x = 1;
for (var limit = 6; x < limit; x += 2) {
alert("Before mult: " + x);
x = x * x;
alert("after mult: " + x);
}
alert(x);

Answer 4

@(G J) last output will be 11 as excepted.... what you get??