Arrays - Assignment

You can instantly read from or write to an item in the sequence if you know its "index," or numeric position within the array.  Array elements are accessed using the index with brackets:

    $bar[0]; # 4
    $bar[100] = 4; # (4, "cat", undef x 98, 4)

Notice three things:
The first element's index is zero
The sigil is now '$' since it represents a scalar
Arrays automatically expand when items are added