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  1. or download this
    use strict;

my $variable_with_a_very_long_name = 1;
print "The value is >>$varaible_with_a_very_long_name<<";
  2. or download this
    # for global variables:
use vars qw(@users $account);
  3. or download this
    for $user (@users) {
    $message = "Hello $user!";
...
for my $user (@users) {
    my $message = "Hello $user!";
};