How to write a unicode symbol in lua

Question

How can I write a Unicode symbol in lua. For example I have to write symbol with 9658
when I write

string.char( 9658 );

I got an error.

Answer 1

Lua does not look inside strings. So, you can just write

mychar = "►"

(added in 2015)

Lua 5.3 introduced support for UTF-8 escape sequences:

The UTF-8 encoding of a Unicode character can be inserted in a literal string with the escape sequence \u{XXX} (note the mandatory enclosing brackets), where XXX is a sequence of one or more hexadecimal digits representing the character code point.

You can also use utf8.char(9658).