title: Global variables in C are static or not?
body: <p>Are global variables in C <code>static</code> or <code>extern</code> by default?<br>
  If global variables are by default <code>static</code> then it means that we would be able to access them in a single file, but we can use global variables in different files as well.<br>
  Does this imply that they have <code>extern</code> storage by default?</p>