Then maybe we could think about the limit as we could say as n approaches infinity, or the limit as delta x becomes very, very, very, very small. And this notion of getting better and better approximations as we take the limit as n approaches infinity, this is the core idea of integral calculus. And it's called integral calculus because the central operation we use, the summing up of an infinite number of infinitesimally thin things is one way to visualize it, is the integral. That this is going to be the integral, in this case, from a to b. And we're gonna learn a lot more depth. In this case, it is a definite integral of f of x, f of x dx. But you can already see the parallels here.