You need an expression, something that can return a value. If you use something that doesn't return a value (like foreach), how could the elsif decide whether to enter or not? Your foreach doesn't even have a body, which makes even less sense. 

elsif ($lec eq $outdate{$key1}) {
   foreach (@pmis) {
      if ($_ eq $outdate{$key1}) {
         ........ 
      }
   }
}

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In reply to Re: Regarding the conditional part of eslif (or if) statement by ikegami
in thread Regarding the conditional part of eslif (or if) statement by ramjamman

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