GREEK SUBSCRIPT SMALL LETTER PHI·U+1D69

Character Information

Code Point
U+1D69
HEX
1D69
Unicode Plane
Basic Multilingual Plane
Category
Modifier Letter

Character Representations

Click elements to copy
EncodingHexBinary
UTF8
E1 B5 A9
11100001 10110101 10101001
UTF16 (big Endian)
1D 69
00011101 01101001
UTF16 (little Endian)
69 1D
01101001 00011101
UTF32 (big Endian)
00 00 1D 69
00000000 00000000 00011101 01101001
UTF32 (little Endian)
69 1D 00 00
01101001 00011101 00000000 00000000
HTML Entity
ᵩ
URI Encoded
%E1%B5%A9

Description

U+1D69 is a Greek letter known as the "Greek Subscript Small Letter Phi". It plays a vital role in digital text by enabling typographers and mathematicians to represent subscripted Greek letters, allowing for more accurate and clear communication in fields such as mathematics, chemistry, and computer science. The character is part of the Unicode standard, which provides a unique code for every character used in written language across the world. In mathematical notation, U+1D69, or ϕ, is often used to represent the golden ratio, phi, an irrational number that appears frequently in mathematics and nature. The use of subscripted Greek letters, including U+1D69, contributes significantly to the precision and clarity of technical documents, scientific papers, and educational materials.

How to type the symbol on Windows

Hold Alt and type 7529 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+1D69. 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+1D69 to binary: 00011101 01101001. 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:
    11100001 10110101 10101001