I am learning the Perl code. I also want to use the beauty of the perl.

I can write like this

 $var or $var = 30;

But in this case how can I write the code using or

Or is there any smart way to write this 

 
if (undef $var) {
  $x = 40;
} else {
  $x = 50;
}

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In reply to Need clean code by ravi45722

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