Let's evaluate f of a. And this flow chart says, well, if f of a is equal to a real number, it's saying we're done. But then there's this little caveat here, probably. And the reason why is that the limit is a different thing than the value of the function. Sometimes they happen to be the same. In fact, that's the definition of a continuous function, which we talk about in previous videos. But sometimes they aren't the same.