Unicode variable names: Difference between revisions
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<pre>2</pre>
=={{header|C++}}==
The C++ language allows the use of Unicode variable names.
For more information visit: https://en.cppreference.com/w/cpp/language/character_literal,
https://en.cppreference.com/w/cpp/language/identifiers and https://learnmoderncpp.com/2021/03/24/a-unicode-primer/
<syntaxhighlight lang="c++">
#include <cstdint>
#include <iostream>
#include <string>
int main() {
uint32_t Δ = 1;
double π = 3.14159;
std::string 你好 = "Hello";
Δ++;
std::cout << Δ << " :: " << π << " :: " << 你好 << std::endl;
}
</syntaxhighlight>
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<pre>
2 :: 3.14159 :: Hello
</pre>
=={{header|Clojure}}==
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=={{header|Elena}}==
ELENA
<syntaxhighlight lang="elena">public program()
{
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Δ := Δ + 1;
console.writeLine
}</syntaxhighlight>
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where δΔ = 1
ψ = δΔ + 1</syntaxhighlight>
=={{Header|Insitux}}==
<syntaxhighlight lang="insitux">
(let Δ😄 1)
(inc Δ😄)
</syntaxhighlight>
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<pre>
2
</pre>
=={{header|J}}==
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The error description refers to the bytes in the UTF encoding of 'Δ' which can't appear (outside a string) in a Wren script.
<syntaxhighlight lang="
var b = 2
var delta = a - b // ok
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{{libheader|Wren-trait}}
However, it is possible to simulate Unicode variable names to some extent by using the ''Var'' class in the above module which stores the names (which can be any valid string) in an internal map.
<syntaxhighlight lang="
Var["Δ"] = 1
Var["Δ"] = Var["Δ"] + 1
System.print(Var["Δ"])</syntaxhighlight>
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<pre>
2
</pre>
=={{header|Zig}}==
'''Works with:''' 0.10.x, 0.11.x, 0.12.0-dev.1594+7048e9366
Links here refer to 0.10.1 documentation, but nothing changed in 0.11.0, and 0.12.0 is not released yet at the moment of writing.
Source code in Zig must be encoded in UTF-8, see [https://ziglang.org/documentation/0.10.1/#Source-Encoding this] page from language reference.
Zig supports non-conforming identifiers (that includes space, use non-English alphabet, shadow reserved keyword etc.) via @"" syntax. See [https://ziglang.org/documentation/0.10.1/#Identifiers this] page from language reference.
<syntaxhighlight lang="zig">const std = @import("std");
pub fn main() void {
var @"Δ": i32 = 1;
@"Δ" += 1;
std.debug.print("{d}\n", .{@"Δ"});
}</syntaxhighlight>
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