DOUBLE-STRUCK CAPITAL PI·U+213F

Character Information

Code Point
U+213F
HEX
213F
Unicode Plane
Basic Multilingual Plane
Category
Uppercase Letter

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E2 84 BF
11100010 10000100 10111111
UTF16 (big Endian)
21 3F
00100001 00111111
UTF16 (little Endian)
3F 21
00111111 00100001
UTF32 (big Endian)
00 00 21 3F
00000000 00000000 00100001 00111111
UTF32 (little Endian)
3F 21 00 00
00111111 00100001 00000000 00000000
HTML Entity
ℿ
URI Encoded
%E2%84%BF

Description

The Unicode character U+213F, known as the DOUBLE-STRUCK CAPITAL PI, plays a vital role in various digital text applications. As a typographical symbol, it is predominantly used in mathematical expressions, scientific notations, and technical documentation to signify capital pi. This character is double-struck, meaning that it appears as if enclosed by a pair of parallel vertical lines, visually emphasizing its presence. The use of this character in digital text often helps to distinguish constants or variables from ordinary text, enhancing readability and reducing ambiguity in these contexts. The DOUBLE-STRUCK CAPITAL PI is not tied to any specific cultural, linguistic, or regional context, but it contributes significantly to the clarity and precision of communication in fields that rely on mathematical and technical notation.

How to type the symbol on Windows

Hold Alt and type 8511 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+213F. 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+213F to binary: 00100001 00111111. 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 10000100 10111111