# How do I do natural logs on a TI-83?

You can work with natural logs by pressing the "LN" button, which is located 3 rows up on the leftmost column. Ln represents ${\log}_{e}$ by default, so you shouldn't need to do any other tinkering there.
You can also work with the natural base $e$ by hitting 2nd and then the division key, or by hitting 2nd and then LN, which will give you an ${e}^{x}$ power (you can replace $x$ with whatever you want).