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my $i; for $i ( 1..10 ){ ... }; print $i };; Use of uninitialized value $i in print at (eval 9) line 1, <STDIN> lin +e 1.
my $i; for $i ( 1 .. $N ) { ... } ## Here we have no way of knowing if we took an early exit; ## thus necessitating additional, unnecessary complexity to retain or +discover that.