This is part of a script
Can someone please tell me what operations are being performed
on the value t

for (my $N = 0; $N <= $Count; $N++) {
        my $t = $N * $N
        $d += ($t ? $t : 1)  

my @ii = unpack("V8", $chunk);

if $chunk is 32 bytes how will the bytes be unpacked into the array
@ii?

my $t = $N * $N;

At the first iteration, $t is 0 (0 squared)
At the second iteration, $t is 1 (1 squared)
At the third iteration, $t is 4 (2 squared)
At the fourth iteration, $t is 9 (3 squared)
and so on ....

After $Count + 1 iterations, the loop terminates, and $t has the value
$count * $Count ($Count squared).

$d += ($t ? $t : 1);

That line just assigns $d + $t to $d ... unless $t is zero (or numerically
equivalent to zero) - in which case it assigns $d + 1 to $d.

print "@ii\n";

(The individual elements of @ii will be separated by a space.)

See 'perldoc perlop'.