RIGHTWARDS ARROW TO BAR·U+21E5

Character Information

Code Point
U+21E5
HEX
21E5
Unicode Plane
Basic Multilingual Plane
Category
Other Symbol

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 87 A5
11100010 10000111 10100101
UTF16 (big Endian)
21 E5
00100001 11100101
UTF16 (little Endian)
E5 21
11100101 00100001
UTF32 (big Endian)
00 00 21 E5
00000000 00000000 00100001 11100101
UTF32 (little Endian)
E5 21 00 00
11100101 00100001 00000000 00000000
HTML Entity
⇥
URI Encoded
%E2%87%A5

Description

The Unicode character U+21E5, known as the RIGHTWARDS ARROW TO BAR, is a symbol used predominantly in mathematics and computer science for denoting various operations and relationships in digital text. In mathematical expressions, it is often utilized to represent an operation called "box-right" or "box minus," where it indicates the difference between two boxed numbers or expressions. This symbol is particularly useful when solving word problems or working with algebraic equations that involve differences. Its role extends beyond mathematics into other technical contexts, such as programming languages, where it can signify various operations like bitwise negation and logical not. Despite its limited use in everyday language, the RIGHTWARDS ARROW TO BAR plays a crucial role in digital text for conveying precise mathematical concepts and technical information.

How to type the symbol on Windows

Hold Alt and type 8677 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+21E5. 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+21E5 to binary: 00100001 11100101. 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 10000111 10100101