Book says this executes 6 times, but I've spent 30 minutes stepping over it in debugger again and again and it only executes 5 times?

Question

Here\'s the code (yes I\'m at total noobie level)

int j = 2;

for (int i = 1; i < 100; i = i * 2)
{
    j = j - 1;
    w