The Newline Character in Different Systems and Its History

CRLF is \r\n or 0D0A

In the old days it was that

• Unix utilized LF or (\n, 0A)
• Dos utilized CRLF or (\r\n, 0A0A)

Later on to GUI era

• Linux is till now still using LF or (\n, 0A)
• Mac started using CR but now is using LF the same as Linux
• Windows is the DOS format with both CRLF

There's another guy most people don't notice, the browser

• Browser show HTML without concerning about newline
• But there's a case in attribute:
  the escape for newline is &#13 (CR) instead of LF.