Hello keesturam, Im sure it could be simplified more, but this is what I came up with! hope it helps :) 

if($input =~ /^(-?)((0|\d+).)?\d+$/)
{
   print ("Yes, it is a number\n");
}

[download]

UPDATE: don't need that 0 in there, 

if($input =~ /^(-?)(\d+.)?\d+$/)

[download]

In reply to Re: Reg Ex exercise by Rudolf
in thread Reg Ex exercise by keesturam

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