Question about chapter 9 while loops

[fkinoshita]

Hi, I hope it's okay to ask here but if it isn't feel free to close it!

I have implemented the while loop and it works fine but I can't modify variables from the outer scope from the while loop block.

Take this code for example:

var i = 1;
while (i <= 10) {
    i = i + 1;
    print i;
}

This creates an infinite loop, am I missing something?