It would depend more on what we are intending to do, are we controlling a terminal, or are we writing to a file (with specific format).
Terminal control is fairly easy answer, there would be some other API to control cursor position, so the code would need to call some function to move the cursor to next line.
For files, it would depend on what the format is. So we might be writing just `<p>hello world</p>` instead of `hello world\n`. In fact I find it bit weird that we are using teletype (and telegraph etc) control protocol (what ASCII mostly is) as our "general purpose text" format; it doesn't make much sense to me.
Except that terminals didn't exist when ASCII was created, printers existed, either with a "carriage" that carried the actual print head (like IBM Selectric typewriters, or the original ASR33 teletypes) or "chain printers" that printed an entire line at a time with a set of rods for each character position that had the entire character set on them.
Terminal control is fairly easy answer, there would be some other API to control cursor position, so the code would need to call some function to move the cursor to next line.
For files, it would depend on what the format is. So we might be writing just `<p>hello world</p>` instead of `hello world\n`. In fact I find it bit weird that we are using teletype (and telegraph etc) control protocol (what ASCII mostly is) as our "general purpose text" format; it doesn't make much sense to me.