About BEL

Integer ASCII code: 7
Binary code: 0000 0111
Octal code: 7
Hexadecimal code: 07
Group: control
Seq: ^G
C/C++ notation: \a or '\a'

Unicode symbol: , int code: 9223 (html &#9223) hex code: 2407 (html &#x2407)


Initially was used to make a sound of bell on the terminal. Time passed and later it was used in the role of a beep on systems that didn't actually possess a physical bell. The inverse video may also be rapidly turned on and off by it (a visual bell).

A bell code (bell character in some cases) is a device control code initially created to ring a small electromechanical bell on tickers as well as on the other teleprinters and teletypewriters. This was done in order to notify operators at the other end of the line, frequently of a newly received message. Via tickers the bell codes were punched into their tapes. When the bell code is received, printers do not print a character. Bell codes are usually represented by the label "BEL". Since 1870 they were in wide use (the Baudot code was the first one).

Video display terminals (VDTs) have replaced teletypewriters. In order to support backward compatibility, they included speakers or buzzers to realize the same function. The same did the personal computers that were the later followers. Nowadays terminal emulators usually place the warnings to the desktop environment (e.g., the Mac OS X Terminal will make a sound of the system warning). Besides, they frequently offer a function of a visual bell with no sound. It's a short flash on the terminal window.


The character that has a 7 value in ASCII and Unicode is BEL. In caret notation it can be can be related to the control-G or ^G. Unicode has a special character for the visual representation of the bell code, "symbol for bell" (␇) at U+2407.

BEL is also represented in the 5-bit Baudot codes. When in "figures" mode, it has number 11 (0x0B).

Talking about the C programming language (created in 1972), here the bell character can be organized in a string or character constant with \a. ('a' means "alert" or "audible". It was chosen this way \b was already taken for the backspace character.)


MD5 Bell, Alert

input value base output hash
BEL char 89E74E640B8C46257A29DE0616794D5D
7 dec 8F14E45FCEEA167A5A36DEDD4BEA2543
00000111 bin 0CCE1B3FBC56ACC685344BCA4840B85A
0000 0111 bin 9835BBD3B178D1454573387F817BA8D7
7 oct 8F14E45FCEEA167A5A36DEDD4BEA2543
07 hex D72D187DF41E10EA7D9FCDC7F5909205
0x07 hex 20462E8E656FE3BB216AC0EE6B089124

SHA256 Bell, Alert

input value base output hash
BEL char CA358758F6D27E6CF45272937977A748FD88391DB679CEDA7DC7BF1F005EE879
7 dec 7902699BE42C8A8E46FBBB4501726517E86B22C56A189F7625A6DA49081B2451
00000111 bin 1FFBB193C8600EDA4381677F6D048D1E9E0A11597E8589A572CFC5BFEEA8413C
0000 0111 bin E9D8E19D1DB84C281B40958A571242A1ECE5F65FC03B5534944D509BDBC02DD9
7 oct 7902699BE42C8A8E46FBBB4501726517E86B22C56A189F7625A6DA49081B2451
07 hex 19B100AB7725C612F3D80FF203CA53CEA5CADAAFAE3BF0F88F0FB4089FE08815
0x07 hex A0222B7BF145FA94D64233F30609911C46D174C80BA1E95DD1D35036B8C2338F

Base64 Bell, Alert

input value base output hash
BEL char Bw==
7 dec Nw==
00000111 bin MDAwMDAxMTE=
0000 0111 bin MDAwMCAwMTEx
7 oct Nw==
07 hex MDc=
0x07 hex MHgwNw==
Back to ASCII table

 2018-2024 © Dmytro Koshovyi. Ukraine, Mykolayiv.