Step 1: Determine the UTF-8 encoding bit layout
The character ⇍ has the Unicode code point U+21CD. 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+21CD to binary:
00100001 11001101. 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 10001101
LEFTWARDS DOUBLE ARROW WITH STROKE·U+21CD
⇍
Character Information
Code Point
U+21CD
HEX
21CD
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol
Character Representations
Click elements to copy| Encoding | Hex | Binary |
|---|---|---|
| UTF8 | E2 87 8D | 11100010 10000111 10001101 |
| UTF16 (big Endian) | 21 CD | 00100001 11001101 |
| UTF16 (little Endian) | CD 21 | 11001101 00100001 |
| UTF32 (big Endian) | 00 00 21 CD | 00000000 00000000 00100001 11001101 |
| UTF32 (little Endian) | CD 21 00 00 | 11001101 00100001 00000000 00000000 |
HTML Entity
⇍
URI Encoded
%E2%87%8D
Description
The Unicode character U+21CD, known as the "Leftwards Double Arrow with Stroke", is a specialized symbol used primarily in digital text for indicating reversible processes or directions that can be executed in reverse order. Its typical usage includes depicting bidirectional switches or operations within computer programming and scientific diagrams where double-headed arrows are insufficient to illustrate the two possible directions. The stroke added to the leftwards double arrow signifies the completeness of the reversible process, emphasizing that any direction can be followed until a certain point is reached. Although it may appear in various typography and digital text applications, the character does not have any specific cultural or linguistic context. It serves as a purely technical symbol to aid understanding in specialized fields such as computer programming, mathematics, and engineering.
How to type the ⇍ symbol on Windows
Hold Alt and type 8653 on the numpad. Or use Character Map.