[newline] What are carriage return, linefeed, and form feed?

Carriage return means to return to the beginning of the current line without advancing downward. The name comes from a printer's carriage, as monitors were rare when the name was coined. This is commonly escaped as \r, abbreviated CR, and has ASCII value 13 or 0x0D.

Linefeed means to advance downward to the next line; however, it has been repurposed and renamed. Used as "newline", it terminates lines (commonly confused with separating lines). This is commonly escaped as \n, abbreviated LF or NL, and has ASCII value 10 or 0x0A. CRLF (but not CRNL) is used for the pair \r\n.

Form feed means advance downward to the next "page". It was commonly used as page separators, but now is also used as section separators. (It's uncommonly used in source code to divide logically independent functions or groups of functions.) Text editors can use this character when you "insert a page break". This is commonly escaped as \f, abbreviated FF, and has ASCII value 12 or 0x0C.


As control characters, they may be interpreted in various ways.

The most common difference (and probably the only one worth worrying about) is lines end with CRLF on Windows, NL on Unix-likes, and CR on older Macs (the situation has changed with OS X to be like Unix). Note the shift in meaning from LF to NL, for the exact same character, gives the differences between Windows and Unix. (Windows is, of course, newer than Unix, so it didn't adopt this semantic shift. I don't know the history of Macs using CR.) Many text editors can read files in any of these three formats and convert between them, but not all utilities can.

Form feed is a bit more interesting (even though less commonly used directly), and with the usual definition of page separator, it can only come between lines (e.g. after the newline sequence of NL, CRLF, or CR) or at the start or end of the file.

Examples related to newline

How can I insert a line break into a <Text> component in React Native? Print "\n" or newline characters as part of the output on terminal Using tr to replace newline with space How to write one new line in Bitbucket markdown? Line break in SSRS expression How to insert a new line in Linux shell script? Replace CRLF using powershell How to write new line character to a file in Java What is the newline character in the C language: \r or \n? How to print values separated by spaces instead of new lines in Python 2.7

Examples related to carriage-return

Create Carriage Return in PHP String? What is the difference between a "line feed" and a "carriage return"? How can I insert new line/carriage returns into an element.textContent? What are the differences between char literals '\n' and '\r' in Java? What's the Use of '\r' escape sequence? Carriage return and Line feed... Are both required in C#? Find and replace - Add carriage return OR Newline In C#, what's the difference between \n and \r\n? See line breaks and carriage returns in editor What are carriage return, linefeed, and form feed?

Examples related to linefeed

What is the difference between a "line feed" and a "carriage return"? Carriage return and Line feed... Are both required in C#? In C#, what's the difference between \n and \r\n? What are carriage return, linefeed, and form feed? Writing a new line to file in PHP (line feed) Carriage Return\Line feed in Java

Examples related to control-characters

What are carriage return, linefeed, and form feed?

Examples related to ansi-escape

List of ANSI color escape sequences What are carriage return, linefeed, and form feed?