Abigail-II, I understand your solution for a variable containing a single digit 1, 2, or 3. However, the 2.14 condition got me wondering how to test at number like that. E.g., how to test that a number of any length contains at least a 1, 2, or 3, but not a decimal point. I've tried everything and I can't decide if it's possible in a regex to say "if this, but not this." Theoretically: 1|2|3 && [^\]. I've tried:

my $string = "278.13";

print "okay\n" if ($string =~ /^1|2|3[^\.]$/);
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and a dozen others. No luck.