Hi, Using regex, I have taken a value and now I want to report a error message if it is not a numeric value. My lines are below: 

if($_ =~ /<blk id="(.+?)"\/>/g)
   {
      my $blk=$1;
      if($blk != \d){print "Invalid value"}
   }

[download]

Now, whether the value is 1 or abc, I am not getting the error. It should accept 1 but not abc. Could anyone help me to identify what's wrong in the code?

In reply to Checking whether a value is numeric or not by rsriram

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