This character is a Other Symbol and is commonly used, that is, in no specific script. The character is also known as St. Andrew's Cross.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2613 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
A saltire, also called Saint Andrew's Cross or the crux decussata, is a heraldic symbol in the form of a diagonal cross. The word comes from the Middle French sautoir, Medieval Latin saltatoria ("stirrup").
From its use as field sign, the saltire came to be used in a number of flags, in the 16th century for Scotland and Burgundy, in the 18th century also as the ensign of the Russian Navy, and for Ireland. Notable 19th-century usage includes some of the flags of the Confederate States of America. It is also used in the flag of Jamaica and on seals, and as a heraldic charge in coats of arms.
The term saltirewise or in saltire refers to heraldic charges arranged as a diagonal cross. The shield may also be divided per saltire, i.e. diagonally.
A warning sign in the shape of a saltire is also used to indicate the point at which a railway line intersects a road at a level crossing.
Representations
System
Representation (click value to copy)
Nº
9747
UTF-8
E2 98 93
UTF-16
26 13
UTF-32
00 00 26 13
URL-Quoted
%E2%98%93
HTML hex reference
☓
Wrong windows-1252 Mojibake
☓
alias
St. Andrew's Cross
Encoding: GB18030 (hex bytes)
81 37 A4 33
RFC 5137
\u'2613'
Bash and Zsh inside echo -e
\u2613
C and C++
\u2613
C#
\u2613
CSS
\002613
Excel
=UNICHAR(9747)
Go
\u2613
JavaScript
\u2613
Modern JavaScript since ES6
\u{2613}
JSON
\u2613
Java
\u2613
Lua
\u{2613}
Matlab
char(9747)
Perl
"\x{2613}"
PHP
\u{2613}
PostgreSQL
U&'\2613'
PowerShell
`u{2613}
Python
\u2613
Ruby
\u{2613}
Rust
\u{2613}
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