Changes

     use warnings;

     use warnings;

The two additional lines request from perl to catch various common problems in your code. They check different things so you need both. A potential problem caught by use strict; will cause your code to stop immediately when it is encountered, while use warnings; will merely give a warning (like the command-line switch -w) and let your code run. To read more about them check their respective manual pages at strict and warnings.

The two additional lines request from perl to catch various common problems in your code. They check different things so you need both. A potential problem caught by '''use strict;''' will cause your code to stop immediately when it is encountered, while '''use warnings;''' will merely give a warning (like the command-line switch -w) and let your code run. To read more about them check their respective manual pages at [http://perldoc.perl.org/strict.html strict] and [http://perldoc.perl.org/warnings.html warnings].

 

=== Basic syntax overview ===

=== Basic syntax overview ===