Use hash functions when Perl scripting

How to use hash functions when Perl scripting This Perl Tutorial series shows you how to use has functions including: 1.)The exists, defined and delete functions. 2.)How to reverse the key/value pairs of a hash, sort hashes and merge hashes. 3.)The split and join functions. 4.)The lc, uc, lcfirst, ucfirst functions and a method to ucfirst every word in a string. 5.)The length, substr, index and rindex functions .