[dsego]

Except it is not correct.

[Apocryphon]

I like how both the student and the Startup hacker mess up bounds-checking, except the student doesn't realize it in the initial case, and the hacker misses it as the codebase gets progressively larger and he or she gets more tired.

[cheapsteak]

I don't get it, what's incorrect about the code?

[dsego]

Try calling the function with 0 or a negative number.