APL FUNCTIONAL SYMBOL QUAD DIAMOND·U+233A

Character Information

Code Point
U+233A
HEX
233A
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 8C BA
11100010 10001100 10111010
UTF16 (big Endian)
23 3A
00100011 00111010
UTF16 (little Endian)
3A 23
00111010 00100011
UTF32 (big Endian)
00 00 23 3A
00000000 00000000 00100011 00111010
UTF32 (little Endian)
3A 23 00 00
00111010 00100011 00000000 00000000
HTML Entity
⌺
URI Encoded
%E2%8C%BA

Description

U+233A, also known as the APL Functional Symbol Quad Diamond, is a special character within the Unicode standard used in digital text. It primarily serves as a mathematical symbol in the APL (a programming language for technical computing) community and other fields involving linear algebra and computational mathematics. This symbol represents a quadratic function, denoting the operation of squaring a given value or variable. In its usage within APL, the Quad Diamond plays an essential role as it helps express operations in a succinct manner. Although not widely recognized outside these specific communities, this character is vital for precise and efficient communication of mathematical concepts. The symbol's existence and use reflect the diversity of the Unicode standard, which aims to include symbols from various cultures, languages, and technical fields. The Quad Diamond exemplifies the utility of Unicode in facilitating clear and concise digital communication across an extensive array of disciplines.

How to type the symbol on Windows

Hold Alt and type 9018 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+233A. 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+233A to binary: 00100011 00111010. 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 10001100 10111010