About newline characters

When I used socket to send an HTTP request, I found that the linefeed \ r \ n in the information I wrote was not effective, and it always showed up as a string. As follows:

Const CRLF = '\ r \ n ';

Then I finally saw the same problem on the Internet. It turns out that when the \ r \ n of this symbol is enclosed in single quotes, It is a pure string and will not be parsed as a line break. Wrap it in double quotes.

Const CRLF = "\ r \ n ";

 

About newline characters