I was able to program my script to reject anything that is not a number. However, it also rejects numbers that have a decimal point too. So, if I enter a number like 3.45, it will reject that and not continue until I have entered a number like 3. Here is the code: 
my $LENGTH = 0;
    while (1) { print "Enter the length!"; "\n";
    chomp ($LENGTH = <>);
    # checking for non-numeric characters
    if ($LENGTH =~ /\D/){ print "\nPlease enter a number\n";
    next; } last if 0 <= $LENGTH and $LENGTH <= 99.99;    
}

[download]
Thanks in advance, Bill Hoefer

In reply to Verifying number input by Anonymous Monk

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