<stdio.h> vs <math.h> - Why do you have to link one and not the other? [duplicate]

Question

I'm confused why you have to type -lm to properly link math to your code, but don't have to do the same for stdio. I've only just started using C, so I apologize if this is a stupid quesiton or I'm missing something obvious.

Answer 1

In short, because of historical reasons,

The functions in stdio.h are in libc, while the functions in math.h are in libm. libc is linked by default but libm isn't.