APL FUNCTIONAL SYMBOL BACKSLASH BAR·U+2340

Character Information

Code Point
U+2340
HEX
2340
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 8D 80
11100010 10001101 10000000
UTF16 (big Endian)
23 40
00100011 01000000
UTF16 (little Endian)
40 23
01000000 00100011
UTF32 (big Endian)
00 00 23 40
00000000 00000000 00100011 01000000
UTF32 (little Endian)
40 23 00 00
01000000 00100011 00000000 00000000
HTML Entity
⍀
URI Encoded
%E2%8D%80

Description

The Unicode character U+2340, also known as the APL Functional Symbol Backslash Bar, is a specialized typographic symbol used primarily in digital text applications. This character holds significant relevance within the realm of mathematical notation and computer programming, particularly within the domain of the esoteric programming language APL (A Programming Language). APL was developed by Charles Samuel "Chuck" Moore in 1966 as a vector-based programming language, which is still used today for its compactness, elegance, and efficiency. In APL notation, U+2340 serves as a functional symbol that represents the backslash bar operation, which performs element-wise multiplication. This operation is central to the computation of arrays in APL, making the character essential for coding and mathematical calculations within this unique language. Despite its specialized usage, U+2340 remains an important component in the broader landscape of digital text, showcasing the rich diversity and adaptability of Unicode characters in catering to various linguistic and technical needs.

How to type the symbol on Windows

Hold Alt and type 9024 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+2340. 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+2340 to binary: 00100011 01000000. 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 10001101 10000000