Step 1: Determine the UTF-8 encoding bit layout
The character ⇄ has the Unicode code point U+21C4. 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+21C4 to binary:
00100001 11000100. 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 10000111 10000100
RIGHTWARDS ARROW OVER LEFTWARDS ARROW·U+21C4
⇄
Character Information
Code Point
U+21C4
HEX
21C4
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol
Character Representations
Click elements to copy| Encoding | Hex | Binary |
|---|---|---|
| UTF8 | E2 87 84 | 11100010 10000111 10000100 |
| UTF16 (big Endian) | 21 C4 | 00100001 11000100 |
| UTF16 (little Endian) | C4 21 | 11000100 00100001 |
| UTF32 (big Endian) | 00 00 21 C4 | 00000000 00000000 00100001 11000100 |
| UTF32 (little Endian) | C4 21 00 00 | 11000100 00100001 00000000 00000000 |
HTML Entity
⇄
URI Encoded
%E2%87%84
Description
The Unicode character U+21C4, known as the "RIGHTWARDS ARROW OVER LEFTWARDS ARROW," is a symbol used in digital text to represent a directional change. Specifically, it signifies a rotation of 180 degrees for an arrow pointing to the left, essentially transforming it into an arrow pointing to the right. This character is primarily used in mathematics and computer science to depict various aspects of vector calculus, such as changes in angles or rotations of vectors. It can also be found in more specialized areas like cryptography, where it may represent a shift cipher or other encoding method. While this symbol does not hold significant cultural or linguistic importance, its precise and technical nature makes it an essential tool for conveying specific concepts and calculations within the scientific community.
How to type the ⇄ symbol on Windows
Hold Alt and type 8644 on the numpad. Or use Character Map.