In PHP you see a lot of print('Hello World' . PHP_EOL); where the dot is string concatenation (underrated choice imho) and PHP_EOL is a predefined constant that

In PHP you see a lot of print('Hello World' . PHP_EOL); where the dot is string concatenation (underrated choice imho) and PHP_EOL is a predefined constant that maps to \n or \r\n depending on platform. You could easily extend that to have global constants for all non-printable ascii characters.