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sub marine {
  $n += 1;  # Global variable $n
  print "Hello, sailor number $n!\n";
...
  $degc = ($degf - 32) * (5/9);
  print "$degf degrees fahrenheit is $degc degrees celsius\n";
}

#/** \fn int mult (int x, int y)
#\brief Multiply two number.
...
#\param y Factor 2.
#\retval Multiplication
#*/

#** \fn int mult (int x, int y)
#brief Multiply two number.
...
#param y Factor 2.
#retval Multiplication
#*

## \fn int mult (int x, int y)
#brief Multiply two number.
...
#param y Factor 2.
#retval Multiplication

#/** @method public int mult (int x, int y)
# @brief Multiply two number.
...
# @param y Factor 2.
# @retval Multiplication
#*/