ERROR-BARRED BLACK SQUARE·U+29EF

Character Information

Code Point
U+29EF
HEX
29EF
Unicode Plane
Basic Multilingual Plane
Category
Math Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 A7 AF
11100010 10100111 10101111
UTF16 (big Endian)
29 EF
00101001 11101111
UTF16 (little Endian)
EF 29
11101111 00101001
UTF32 (big Endian)
00 00 29 EF
00000000 00000000 00101001 11101111
UTF32 (little Endian)
EF 29 00 00
11101111 00101001 00000000 00000000
HTML Entity
⧯
URI Encoded
%E2%A7%AF

Description

The Unicode character U+29EF, known as the ERROR-BARRED BLACK SQUARE, is a typographical symbol used in digital text to represent an error, glitch, or disruption. It is particularly utilized in programming and debugging contexts, where it helps indicate that an issue has occurred within code, making it easier for developers to identify and resolve the problem. The ERROR-BARRED BLACK SQUARE does not have any specific cultural, linguistic, or technical context outside of its usage as a symbol for error or disruption. Its primary purpose is to facilitate accurate and efficient communication among programmers and technical professionals, ensuring that issues are promptly addressed and resolved in the digital world.

How to type the symbol on Windows

Hold Alt and type 10735 on the numpad. Or use Character Map.

  1. Step 1: Determine the UTF-8 encoding bit layout

    The character has the Unicode code point U+29EF. In UTF-8, it is encoded using 3 bytes because its codepoint is in the range of 0x0800 to 0xffff.

    Therefore we know that the UTF-8 encoding will be done over 16 bits within the final 24 bits and that it will have the format: 1110xxxx 10xxxxxx 10xxxxxx
    Where the x are the payload bits.

    UTF-8 Encoding bit layout by codepoint range
    Codepoint RangeBytesBit patternPayload length
    U+0000 - U+007F10xxxxxxx7 bits
    U+0080 - U+07FF2110xxxxx 10xxxxxx11 bits
    U+0800 - U+FFFF31110xxxx 10xxxxxx 10xxxxxx16 bits
    U+10000 - U+10FFFF411110xxx 10xxxxxx 10xxxxxx 10xxxxxx21 bits
  2. Step 2: Obtain the payload bits:

    Convert the hexadecimal code point U+29EF to binary: 00101001 11101111. Those are the payload bits.

  3. Step 3: Fill in the bits to match the bit pattern:

    Obtain the final bytes by arranging the paylod bits to match the bit layout:
    11100010 10100111 10101111