Hmm....actually, that doesn't really help at all!

If you want to know the index of the last element of an array, do this:

@letterList = ("a", "b", "c", "d");
#refer to the last array index 
#using '$#array' syntax:

print $#letterList;
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This will, of course, output "3".

You can also refer to the value of the last element of the array
using negative indices, e.g. $letterList[-1] will also refer to "d".

--
Microsoft delendum est.