my $ret_val;
my $i;
if ($#your_array < 0){
## do appropriate thing
}
elsif ($#your_array == 0){ ## return the only value it has}
## following is the ELSE part
for (my $i = 0; i < $#your_array; ++i)
{
$ret_val = your_array[i+1];
$ret_val = your_array[i] if (your_array[i] > your_array[i+1]);
}
## $ret_val contains the max number.
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