Assuming you mean you don't want more than 8 digits in a row: 
if ($Number =~ /\d{9}/) {
    print "Line has more than 8 digits!\n"
}
elsif ($Number =~ /\d/) {
    $N = $Number;
}
else {
    print "Line has no digits at all!\n";
}

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In reply to Re: matching between 1 to 8 digits but not more by JavaFan
in thread matching between 1 to 8 digits but not more by ozgurp

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