换页(FF)

The Form Feed symbol, also known as clear screen, was used in computer terminals, printers, and text processing systems to indicate the end of a page and move to the beginning of the next page.

As for text editors and computer terminals, the Form Feed symbol is typically used to separate pages of text within a single file. Speaking of printers, the U+000C symbol signals that the printer should finish the current page and start printing the next page.

When it comes to modern computer systems and applications, this symbol is rarely used. It happens so because other mechanisms are usually employed for dividing and formatting pages. However, Form Feed can still be found in text files or code where it performs its original function of separating pages in the text.

Like other control characters, this one has no visible representation and doesn't occupy a lot of space on screen or in typed text. However, there is a separate symbol in 控制图片  2400–243F representing the graphical image of Form Feed, which shows up as the abbreviation FF (Form Feed) — ␌ .

Escape sequence: \f.

It's one of the eight control symbols, the presence of which is required by POSIX:

• \0   ;
• \a   ;
• \b   ;
• \t   ;
• \n   ;
• \v   ;
• \f   ;
• \r   .

符号 「换页(FF)」 包含在 「基本拉丁字母」 块的 「C0控制」 子块中，并在1993年作为Unicode版本1.1的一部分获得批准。