The correct character to use, at leat in the Unix world, is "\n"; for DOS-based systems, "\n\r" is appropriate.
works always and Perl will do "The Right Thing" depending on your OS.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James