Programming is very different from and far more useful than what they call "math" in school, but basically any analysis of your program or of possible improvements is going to involve methods and knowledge that people called "mathematicians" and "computer scientists" happen to be very familiar with.

I always say that the best education I got for preparation for programming, was good ol' Algebra 2.

Depending on what type of programming we do, other math disciplines can be extremely useful, but A2 was what taught me how to do things like refactor, use variables, functions, and balance; all skills that have direct analogues in general-purpose programming.

[EDITED TO ADD] Also, stories. Word problems were very important.