Do either of these perform the check on all the variables and then only execute if they are all defined? Example: $ipaddress is defined, $prefix is defined, $interface is undef. I still want to run the substitution on $ipaddress, $prefix, so effectively have the variables defined state unrelated.

Hence, I think I may need to do it separately?

In reply to Re^2: Test if multiple variables are defined by stroke
in thread Test if multiple variables are defined by stroke

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