1.4. A Note about Source Files

In Perl, every module resides in his own file, and it is sometimes even necessary to put them inside a nested directory structure. (Note that it does not free a programmer from designating the module's name by a special header)

So far all of our scripts were self-contained, but now we may have to see code of several files at once. To ease this transition every file will contain the filename in its header comment. The filename will be given in UNIX notation, with slashes (/) and all, and will be relative to the directory in which the script is executed.