Step 1: Determine the UTF-8 encoding bit layout
The character ℁ has the Unicode code point U+2101. 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+2101 to binary:
00100001 00000001. 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 10000100 10000001
ADDRESSED TO THE SUBJECT·U+2101
℁
Character Information
Code Point
U+2101
HEX
2101
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol
Character Representations
Click elements to copy| Encoding | Hex | Binary |
|---|---|---|
| UTF8 | E2 84 81 | 11100010 10000100 10000001 |
| UTF16 (big Endian) | 21 01 | 00100001 00000001 |
| UTF16 (little Endian) | 01 21 | 00000001 00100001 |
| UTF32 (big Endian) | 00 00 21 01 | 00000000 00000000 00100001 00000001 |
| UTF32 (little Endian) | 01 21 00 00 | 00000001 00100001 00000000 00000000 |
HTML Entity
℁
URI Encoded
%E2%84%81
Description
The Unicode character U+2101, "☐," is known as the Checkbox Mark. It holds a significant role in digital text, primarily used in user interface design and online forms to represent checkboxes. The symbol offers users the ability to select or deselect an option by clicking on it. This interactive functionality is vital for data collection and input validation in various applications, such as surveys, preferences settings, and agreement prompts. Although it may not be culturally significant in a traditional sense, its widespread use across diverse languages and platforms highlights the importance of universally recognized symbols in digital communication and interaction.
How to type the ℁ symbol on Windows
Hold Alt and type 8449 on the numpad. Or use Character Map.