APL FUNCTIONAL SYMBOL JOT UNDERBAR·U+235B

Character Information

Code Point
U+235B
HEX
235B
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 8D 9B
11100010 10001101 10011011
UTF16 (big Endian)
23 5B
00100011 01011011
UTF16 (little Endian)
5B 23
01011011 00100011
UTF32 (big Endian)
00 00 23 5B
00000000 00000000 00100011 01011011
UTF32 (little Endian)
5B 23 00 00
01011011 00100011 00000000 00000000
HTML Entity
⍛
URI Encoded
%E2%8D%9B

Description

The Unicode character U+235B, known as the "APL Functional Symbol Jot Underbar," holds a significant place within the realm of digital text due to its association with the programming language APL (A Programming Language). It is typically utilized in APL's syntax for denoting a subscript in mathematical expressions. This character, which boasts a distinct appearance characterized by a vertical line and an oblique stroke below a j-like form, holds particular cultural, linguistic, and technical importance within the community of mathematicians and computer programmers who employ APL. Its primary function is to differentiate subscripts from superscripts in APL's notation system, facilitating a clearer and more precise representation of complex mathematical operations. Despite its specialized usage, this character contributes to the versatility and functionality of digital text, emphasizing the vast potential for customization within the Unicode Standard.

How to type the symbol on Windows

Hold Alt and type 9051 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+235B. 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+235B to binary: 00100011 01011011. 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 10011011