Using this hands-on guide, learn how to: Perform operations on scalar values Use scalar, array and associative array variables Use flow control statements such as if, unless, while, until, for and foreach Use conditional expressions such as numeric and string comparison, regular expressions, file testing and Perl statements Create and use file handles to read and write directly to files Create format statements to make formatted output Use regular expressions to search for and replace sub-strings within a string Use Perl utilities such as split, join, index and substr Control the file system and processes from within a Perl script Create and use functions including handling the scope of variables Import existing modules into your Perl script.