I have a small Perl script that I need to have the STDIN be numeric, but I need to refer to it as a string also. My script runs, but I get error messages about the strings not being numeric. 
#!/bin/perl -w 
use strict; 

my $days = 0; 

while ("$days" ne "q")
{
    print "Please enter a single positive integer that  represents a n
+umber of days" . , " that you wish to convert into seconds. ,(enter q
+ to quit): "; 

    $days=<STDIN>; 
    chomp $days; 
    
    if ($days > 0)
    {
         my $seconds = $days * 86400; 
         my $plural  = ($days ==1) ? '': 's'; 

         print "\n[$days] day$plural = [$seconds] seconds.\n\n";
    }
    elsif ($days < 0) 
    {
         print "!!! Invalid input.  Value must be a positive integer."
+; 
    }
    elsif ("$days" eq "") 
    {
         print "!!! You must enter a positive integer.\n\n";
    } 
}  
print "Goodbye\!\n\n";

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Janitored by Arunbear - added code tags

In reply to String/Numeric Manipulation by Ms. T.

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