I understand your issue now... the arguments to $osVal and $odVal can either be undef or the empty string when the default value should be used for them.

In that case, a convenient solution is the ||= operator: 

  $odVal ||= 0;
  $osVal ||= 0;

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In reply to Re: default value for a scalar by pc88mxer
in thread default value for a scalar by rightfield

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