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introduction to web programming
Using a list array  
The benefit of ordering the elements in a list array is that we can easily grab one value out of the list on demand. To do this, we use Perl's subscripting operator using the format:

    $array_name[list_element_number]

When pulling an element out of a list array, we create a scalar variable with the same name as the array, prefixed with the usual dollar sign that denotes scalar variables.

For example, the first element of the array @available_colors is accessed as $available_colors[0].

Notice that the first element is accessed with a zero. This is important. List arrays begin counting at zero, not one. Thus, $available_colors[0] is a variable placeholder for the word "red". Likewise, $available_colors[1] equals "green" and $available_colors[2] equals "blue".

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