APL FUNCTIONAL SYMBOL QUAD DELTA·U+234D

Character Information

Code Point
U+234D
HEX
234D
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 8D 8D
11100010 10001101 10001101
UTF16 (big Endian)
23 4D
00100011 01001101
UTF16 (little Endian)
4D 23
01001101 00100011
UTF32 (big Endian)
00 00 23 4D
00000000 00000000 00100011 01001101
UTF32 (little Endian)
4D 23 00 00
01001101 00100011 00000000 00000000
HTML Entity
⍍
URI Encoded
%E2%8D%8D

Description

U+234D, also known as APL Functional Symbol Quad Delta, is a typographical character primarily used within the APL (A Programming Language) system. It represents the mathematical concept of "quad delta," which is utilized to denote the fourth order derivative in a series expansion. The character serves a vital role in digital text related to mathematics and programming, particularly when dealing with calculus and differential equations. Although not widely used in general linguistic contexts, U+234D holds significant importance within specific technical domains such as computer science, engineering, and mathematical modeling.

How to type the symbol on Windows

Hold Alt and type 9037 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+234D. 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+234D to binary: 00100011 01001101. 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 10001101