Function to pass a variable to numeric value

[Ruben Montes]

Hello,
I'm working with Net::SNMP and I need to consult an OID. The last number of
the OID is a variable and I want to make a get of this OID, but the debugger
says it's not a numeric value... 

        $i=1
        while($i<4){
                my $descr ='1.3.6.1.2.1.2.2.1.2.($i)';
                ...
How can I pass this $i to a valid numeric value?

Thanks,

Ruben

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