Hi experts, I have two values that I am passing to a subroutine. If they are empty I want to give them a default value of zero. How should I change what I am doing because I keep getting the complaint: "Use of uninitialized value in length..." What I am trying to accomplish by the subroutine is to only print the line if there is a value greater than zero in either of the scalars. This how I call the subroutine: 
print_if(\*FH,'AXS ',$aOrder->{rx_OD_Axis},$aOrder->{rx_OS_Axis});

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This is the subroutine: 
sub print_if {
  my($FH, $orderKey, $odVal, $osVal) = @_;
  #if (!defined $odVal) {$odVal = 0;}
  #if (!defined $osVal) {$osVal = 0;}
  if (!(length($odVal) > 0)) {$odVal = "0";}
  if (!(length($osVal) > 0)) {$osVal = '0';}
  if ($odVal > 0 || $osVal > 0) {
    print $FH $orderKey.' '.$odVal.' '.$osVal."\n";
  }
}

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Thank you for your help. Warm regards,

In reply to default value for a scalar by rightfield

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