LEFT RIGHT WAVE ARROW·U+21AD

Character Information

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

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 86 AD
11100010 10000110 10101101
UTF16 (big Endian)
21 AD
00100001 10101101
UTF16 (little Endian)
AD 21
10101101 00100001
UTF32 (big Endian)
00 00 21 AD
00000000 00000000 00100001 10101101
UTF32 (little Endian)
AD 21 00 00
10101101 00100001 00000000 00000000
HTML Entity
↭
URI Encoded
%E2%86%AD

Description

The Unicode character U+21AD, known as the Left Right Wave Arrow, is a versatile symbol used primarily in digital texts for directional and mathematical purposes. Its typical usage involves representing an arrow that changes direction depending on its context, making it particularly useful in computer graphics, diagrams, and mathematical notation. The Left Right Wave Arrow is part of the Mathematical Alphanumeric Symbols block in Unicode, which includes characters specifically designed for use in mathematical expressions. While not as widely used as some other Unicode characters, the Left Right Wave Arrow has found its niche in certain technical and mathematical contexts due to its unique ability to depict a seamless transition or oscillation between two directions.

How to type the symbol on Windows

Hold Alt and type 8621 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+21AD. 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+21AD to binary: 00100001 10101101. 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 10000110 10101101