The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it is written from left to right. When changing direction it is not mirrored. The word that U+0418 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with 4 other glyphs.
The Wikipedia has the following information about this codepoint:
The Cyrillic I (И и; italics: И и or И и; italics: Ии) is a letter used in almost all modern Cyrillic alphabets with the exception of Belarusian.
It commonly represents either the close front unrounded vowel /i/ (e.g., in Russian), like the pronunciation of ⟨i⟩ in "machine", or the near-close near-front unrounded vowel /ɪ/, (e.g., in Ukrainian), like the pronunciation of ⟨i⟩ in "bin".
Representations
System
Representation (click value to copy)
Nº
1048
UTF-8
D0 98
UTF-16
04 18
UTF-32
00 00 04 18
URL-Quoted
%D0%98
HTML hex reference
И
Wrong windows-1252 Mojibake
И
HTML named entity
И
Encoding: BIG5 (hex bytes)
C7 B6
Encoding: BIG5HKSCS (hex bytes)
C7 FC
Encoding: CP855 (hex bytes)
B8
Encoding: CP866 (hex bytes)
88
Encoding: CP932 (hex bytes)
84 49
Encoding: CP949 (hex bytes)
AC AA
Encoding: CP950 (hex bytes)
C7 B6
Encoding: CP1125 (hex bytes)
88
Encoding: CP1251 (hex bytes)
C8
Encoding: EUC_JP (hex bytes)
A7 AA
Encoding: EUC_JIS_2004 (hex bytes)
A7 AA
Encoding: EUC_JISX0213 (hex bytes)
A7 AA
Encoding: EUC_KR (hex bytes)
AC AA
Encoding: GB2312 (hex bytes)
A7 AA
Encoding: GBK (hex bytes)
A7 AA
Encoding: GB18030 (hex bytes)
A7 AA
Encoding: HZ (hex bytes)
7E 7B 27 2A 7E 7D
Encoding: ISO2022_JP (hex bytes)
1B 24 42 27 2A 1B 28 42
Encoding: ISO2022_JP_1 (hex bytes)
1B 24 42 27 2A 1B 28 42
Encoding: ISO2022_JP_2 (hex bytes)
1B 24 42 27 2A 1B 28 42
Encoding: ISO2022_JP_2004 (hex bytes)
1B 24 42 27 2A 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)
1B 24 42 27 2A 1B 28 42
Encoding: ISO2022_JP_EXT (hex bytes)
1B 24 42 27 2A 1B 28 42
Encoding: ISO2022_KR (hex bytes)
1B 24 29 43 0E 2C 2A 0F
Encoding: ISO8859_5 (hex bytes)
B8
Encoding: JOHAB (hex bytes)
DE AA
Encoding: KOI8_R (hex bytes)
E9
Encoding: KOI8_T (hex bytes)
E9
Encoding: KOI8_U (hex bytes)
E9
Encoding: KZ1048 (hex bytes)
C8
Encoding: MAC_CYRILLIC (hex bytes)
88
Encoding: PTCP154 (hex bytes)
C8
Encoding: SHIFT_JIS (hex bytes)
84 49
Encoding: SHIFT_JIS_2004 (hex bytes)
84 49
Encoding: SHIFT_JISX0213 (hex bytes)
84 49
Encoding: CP1025 (hex bytes)
CB
Encoding: CP1123 (hex bytes)
CB
LATEX
\cyrchar\CYRI
Adobe Glyph List
Iicyrillic
Adobe Glyph List
afii10026
digraph
I=
RFC 5137
\u'0418'
Bash and Zsh inside echo -e
\u0418
C and C++
\u0418
C#
\u0418
CSS
\000418
Excel
=UNICHAR(1048)
Go
\u0418
JavaScript
\u0418
Modern JavaScript since ES6
\u{418}
JSON
\u0418
Java
\u0418
Lua
\u{418}
Matlab
char(1048)
Perl
"\x{418}"
PHP
\u{418}
PostgreSQL
U&'\0418'
PowerShell
`u{418}
Python
\u0418
Ruby
\u{418}
Rust
\u{418}
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