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 10 ? 'Hello World!\n';

 use cout;
 print << 'Hello World!\n';

 query::statement->execute('SELECT "Hello World!\n"');

 procedure perl is begin(print 'Hello World!\n')

 <?perl <print>'Hello World!\n'</print>; ?>

 use LC0.ascii /Hello, world!/;
 movl $LC0, (%esp);

 print *, "Hello World!",
       e\nd