On Wed, Dec 01, 2004 at 02:12:58 +0200, John wrote:
> Hello
> 
> Is there any special function for that job?

personally I would use a rexex:

if ($myunknownvalue =~ m/^\d*$/)
{
        print "this is a number\n";
}
else
{
        print "this is some crap\n";
}

hope this helps

mat

-- 
Cats land on their feet. 
Toast lands jellyside down.
A cat glued to some jelly toast will hover in quantum indecision 

perl -e'$_=q#: 13_2: 12/o{>: 8_4) (_4: 6/2^-2; 3;-2^\2: 5/7\_/\7:\
        1           m m::#;y#:#\n#;s#(\D)(\d+)#$1x$2#ge;print'
        
Yes, of course it's the right cabl [le0: NO CARRIER]

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