How should the #include statement be used?

[Ben321]

It's been a few years since I used C ... OK, ten ... but the difference is the location in which the included resource is found:

#include <stdio.h> // Locates and loads stdio.h in where the LIB environment variable points to.
#include "stdio.h" // Loads stdio.h in the current directory.

-Max

In which situation should I use each? They both seem to work when I tried it for the same use in the program.