Step 1: Determine the UTF-8 encoding bit layout
The character ∉ has the Unicode code point U+2209. In UTF-8, it is encoded using 3 bytes because its codepoint is in the range of
0x0800to0xffff.
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 thexare the payload bits.UTF-8 Encoding bit layout by codepoint range Codepoint Range Bytes Bit pattern Payload length U+0000 - U+007F 1 0xxxxxxx 7 bits U+0080 - U+07FF 2 110xxxxx 10xxxxxx 11 bits U+0800 - U+FFFF 3 1110xxxx 10xxxxxx 10xxxxxx 16 bits U+10000 - U+10FFFF 4 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx 21 bits Step 2: Obtain the payload bits:
Convert the hexadecimal code point U+2209 to binary:
00100010 00001001. Those are the payload bits.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 10001000 10001001
NOT AN ELEMENT OF·U+2209
∉
Character Information
Code Point
U+2209
HEX
2209
Unicode Plane
Basic Multilingual Plane
Category
Math Symbol
Character Representations
Click elements to copy| Encoding | Hex | Binary |
|---|---|---|
| UTF8 | E2 88 89 | 11100010 10001000 10001001 |
| UTF16 (big Endian) | 22 09 | 00100010 00001001 |
| UTF16 (little Endian) | 09 22 | 00001001 00100010 |
| UTF32 (big Endian) | 00 00 22 09 | 00000000 00000000 00100010 00001001 |
| UTF32 (little Endian) | 09 22 00 00 | 00001001 00100010 00000000 00000000 |
HTML Entity
∉
URI Encoded
%E2%88%89
Description
The Unicode character U+2209 is known as the "Not an Element of" symbol. This typographical character holds a significant role in digital text, primarily in mathematical notation. It is often employed to denote the non-membership or exclusion of an element from a given set, indicating that a particular item does not belong within the specified grouping. While its usage may seem niche, it carries considerable weight in technical and scientific documentation where precise representation of relationships between elements is critical. Despite its specialized application, U+2209 remains an essential tool for clear communication in fields such as computer science, engineering, and mathematics. In these contexts, the character serves to reduce ambiguity and ensure clarity, contributing to accuracy and efficiency in problem-solving and research.
How to type the ∉ symbol on Windows
Hold Alt and type 8713 on the numpad. Or use Character Map.