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  1. or download this
    my $foo;
my $foo_new;

...
print fooz,"\n";   # Reading
fooz = "Foo";      # Assignment
print fooz,"\n";   # Reading
  2. or download this
    my $foo;
my $foo_new;

...
print fooz,"\n";   # Reading
fooz = "Foo";      # Assignment
print fooz,"\n";   # Reading