Did you read your array in from a file? Did you forget to chomp the newlines?
Try adding this before your loop:
chomp @voltages;
for my $count ( ... ) {
...
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.