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  1. or download this
    #!/usr/bin/perl -w
use strict;

...
package R;
print "R is >>$R<<\n";
print "var is >>$var<<\n";
  2. or download this
    #!/usr/bin/perl -w
use strict;

...
package R;
print "R is >>$R<<\n";
print "var is >>$var<<\n";
  3. or download this
    #!/usr/bin/perl -w
use strict;
...
package R;
# print "R is >>$R<<\n";
print "var is >>$var<<\n";
  4. or download this
    #!/usr/bin/perl -w
use strict;
...
package R;
print "var is >>$var<<\n";
print "var is ", show_R(), "\n";