IDEOGRAPHIC DESCRIPTION CHARACTER SUBTRACTION·U+31EF

Character Information

Code Point
U+31EF
HEX
31EF
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E3 87 AF
11100011 10000111 10101111
UTF16 (big Endian)
31 EF
00110001 11101111
UTF16 (little Endian)
EF 31
11101111 00110001
UTF32 (big Endian)
00 00 31 EF
00000000 00000000 00110001 11101111
UTF32 (little Endian)
EF 31 00 00
11101111 00110001 00000000 00000000
HTML Entity
㇯
URI Encoded
%E3%87%AF

Description

U+31EF is a unique Unicode character known as "IDEOGRAPHIC DESCRIPTION CHARACTER SUBTRACTION." In digital text, this symbol often serves as an indicator to subtract the value of one ideographic description from another in certain mathematical calculations. It holds significant cultural, linguistic, and technical importance in East Asian typography, particularly in Chinese, Japanese, and Korean languages, where it is frequently used in contexts requiring the representation of subtraction operations in written form. As an essential tool for accurate communication in these linguistic spheres, U+31EF plays a vital role in digital text processing systems, ensuring that complex mathematical expressions are correctly interpreted by software applications.

How to type the symbol on Windows

Hold Alt and type 12783 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+31EF. 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+31EF to binary: 00110001 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:
    11100011 10000111 10101111