Hi, what do i miss?

Question

function factor(x) {
z=1
for(i=1; i <=x; i++){
z=z*i;
}
document.write(x);
}
var y = prompt("blabla?");
if (y>=o){
factor(y);
}
else document.write("blibli");

Answer 1

1) "y >= o", thats an o (letter) not a 0.
2) "document.write(x);"
Did you want to show the factorial?
So: document.write(z);
*Try using proper naming conventions to avoid this confusion.
3) i needs to be a var,
for(var i = 1; etc..)
same with z,
var z = 1;

Answer 2

ohh, thanks. Now it working))