MULTIPLICATION SIGN WITH UNDERBAR·U+2A31

Character Information

Code Point
U+2A31
HEX
2A31
Unicode Plane
Basic Multilingual Plane
Category
Math Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 A8 B1
11100010 10101000 10110001
UTF16 (big Endian)
2A 31
00101010 00110001
UTF16 (little Endian)
31 2A
00110001 00101010
UTF32 (big Endian)
00 00 2A 31
00000000 00000000 00101010 00110001
UTF32 (little Endian)
31 2A 00 00
00110001 00101010 00000000 00000000
HTML Entity
⨱
URI Encoded
%E2%A8%B1

Description

The Unicode character U+2A31, known as the Multiplication Sign with Underscore (⊗), serves a specific role in digital text by representing a mathematical operator symbol. It is commonly utilized to denote multiplication, particularly in computer programming and scientific documentation. This character is part of the Miscellaneous Technical category within the Unicode Standard, which encompasses various symbols and characters used in specialized fields like mathematics, engineering, and computing. While not widely prevalent in everyday text or communication, the Multiplication Sign with Underscore holds significance in contexts where precision in mathematical notation is paramount.

How to type the symbol on Windows

Hold Alt and type 10801 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+2A31. 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+2A31 to binary: 00101010 00110001. 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 10101000 10110001