Okay, I figured this would be easy, and if not, would be simple to find, but most of what I'm finding is overkill. I want to check user input for a single digit. 0-9, but not 10, 11, 12, 200, 1a, 2b, etc. I thought that /\d/ only returned a single-digit number, but it's also returning double digits. Here's what I"m working with. 
$input = <STDIN>
  if ($input =~ /\d/) {
    print "input was a single digit number\n";
  } else {
    print "input wasn't a single digit number\n";
  }

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I also tried: 
$input = <STDIN>
  if ($input =~ /[0-9]/) {
    print "input was a single digit number\n";
  } else {
    print "input wasn't a single digit number\n";
  }

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which works but will return true for input like 2a, 22, 33, 5dfsdf I need it to return true only if the number is single digit. In goofing around, I found that this does work... 
my $number;
chomp ($number = <STDIN>);
if ($number < 10) {
  print "input was either 0-9 or -\n";
}

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...except for something like 2a, which in Perl's eyes is 0, no?

In reply to Checking for single digit by Anonymous Monk

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