ASCII 12 — FF

Form Feed (FF) advances the printer output to the top of the next page, originally designed for line printers and continuous-feed paper. Written as '\f' in escape sequences, it triggers a page eject on physical printers and is sometimes used in source code as a logical section divider. Some programming style guides, including early Python conventions, used Form Feed characters to visually separate code sections in editors that recognized them. In PostScript and PCL printer command languages, FF remains a valid page break instruction.

Whitespace characters create visual separation and structural formatting in text without rendering a visible glyph. Whitespace handling is a critical design consideration across programming languages, markup systems, and data formats: Python uses indentation for block structure, HTML collapses consecutive spaces into one, and tools like linters flag inconsistent whitespace patterns. The interplay between spaces, tabs, line feeds, and other whitespace characters has produced some of the longest-running formatting debates in the entire history of software development.

In the ASCII encoding table, Form Feed is assigned code point 12 in decimal (0x0C hexadecimal, 014 octal, 00001100 binary). The 7-bit ASCII standard, first published in 1963 by the American Standards Association, defines exactly 128 characters that remain the foundation of text encoding systems worldwide. UTF-8, the dominant encoding on the modern web, is fully backward compatible with ASCII — every ASCII character is encoded as the identical single byte in UTF-8, guaranteeing that Form Feed works reliably across all operating systems, programming languages, and internet protocols.