UPWARDS WHITE DOUBLE ARROW·U+21EE

Character Information

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

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 87 AE
11100010 10000111 10101110
UTF16 (big Endian)
21 EE
00100001 11101110
UTF16 (little Endian)
EE 21
11101110 00100001
UTF32 (big Endian)
00 00 21 EE
00000000 00000000 00100001 11101110
UTF32 (little Endian)
EE 21 00 00
11101110 00100001 00000000 00000000
HTML Entity
⇮
URI Encoded
%E2%87%AE

Description

The Unicode character U+21EE, also known as the Upwards White Double Arrow, serves a critical function within digital text communication. This symbol is frequently employed in mathematical equations, software programming, and scientific notation to indicate an upward movement or increasing trend. In mathematical contexts, it's used for expressing vector-like entities that point upwards. It also plays a crucial role in programming languages where it denotes an increase in value or degree, often seen in control structures like loops. The character is part of the Mathematical Operators block within Unicode and represents a double arrow pointing upward, symbolizing either an inequality greater than or a vector moving towards higher values. Its usage does not vary significantly across different cultures or languages due to its universal applicability in mathematical and programming contexts. Despite its simple appearance, this character is integral to precise and effective communication of complex concepts in various disciplines.

How to type the symbol on Windows

Hold Alt and type 8686 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+21EE. 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+21EE to binary: 00100001 11101110. 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 10101110