<p>Your answer will depend on whether you’re a computer science person or a mathematician ;)</p>
<p>Okay…
Well, the difference is whether it’s
0! = 1
or
0 != 1</p>
<p>0 factorial = 1</p>
<p>Lol, I’m actually a mathematical programmer (I compete on ProjectEuler.net) and I saw the 0 doesn’t equal 1 meaning first.</p>
<p>Haha I wish it could’ve been clearer</p>