in reply to Re^2: reprompt user input, until validation pass
in thread reprompt user input, until validation pass

 if($ip_no =~ /\D/ || $ip_no=~ //)

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That is the same as saying: 

 if($ip_no =~ /\D/ || $ip_no=~ /\D/)

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Because an empty match operator uses the last successfully matched regular expression.

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Re^4: reprompt user input, until validation pass
by ansh batra (Friar) on Oct 18, 2011 at 04:43 UTC
    replace
    -- if($ip_no =~ /\D/ || $ip_no=~ //)
++ if($ip_no =~ /\D/)

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