This is probably what you're after.

my $cmd = $step_no || 0; # If $step_no is 0, it assigns... uh, 0 over it.

Note that if you're accepting user input, like $step_no = param("step") or something you should validate all user parameters before using them in other code. Perhaps-

my $cmd = $step_no =~ /\A\d+\z/ ? $step_no : 0;

In reply to Re: reduce line of code by Your Mother
in thread reduce line of code by Sun751

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