NUMBER EIGHTEEN FULL STOP·U+2499

Character Information

Code Point
U+2499
HEX
2499
Unicode Plane
Basic Multilingual Plane
Category
Other Number

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 92 99
11100010 10010010 10011001
UTF16 (big Endian)
24 99
00100100 10011001
UTF16 (little Endian)
99 24
10011001 00100100
UTF32 (big Endian)
00 00 24 99
00000000 00000000 00100100 10011001
UTF32 (little Endian)
99 24 00 00
10011001 00100100 00000000 00000000
HTML Entity
⒙
URI Encoded
%E2%92%99

Description

The Unicode character U+2499, known as the NUMBER EIGHTEEN FULL STOP, is a specialized typographical symbol used in digital text for mathematical equations and scientific notations. It represents the number 18 with a horizontal line, or "full stop," placed beneath it, making it visually distinct from other numerals. This unique representation assists in preventing misreading of numerical values in complex mathematical expressions and calculations. Although the character is not widely used in everyday digital text, its presence can be crucial in scientific documents, engineering applications, and computer programming contexts to avoid ambiguity and enhance clarity.

How to type the symbol on Windows

Hold Alt and type 9369 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+2499. 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+2499 to binary: 00100100 10011001. 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 10010010 10011001