I am experimenting with the Escape sequences and can not really use the \U sequence (UTF-32)
It does not compile as it can not recognize the sequence for some reason.
It recognizes it as UTF-16.
Could you please help me?
Your problem is that you copied
\U00HHHHHH from the documentation page Strings (C# Programming Guide): String Escape Sequences:
\U00HHHHHH is not itself a valid UTF-32 escape sequence — it’s a mask where each
H indicates where a Hex character must be typed. The reason it’s not valid is that hexadecimal numbers consist of the digits 0-9 and the letters A–F or a–f — and
H is not one of these characters. And the literal mentioned in comments,
"\U001effff", does not work because it falls outside the range the range of valid UTF-32 characters values specified immediately thereafter in the docs:
(range: 000000 – 10FFFF; example:
The c# compiler actually checks to see if the specified UTF-32 character is valid according to these rules:
// These compile because they're valid Hex numbers in the range 000000 - 10FFFF padded to 8 digits with leading zeros: Console.WriteLine("\U0001F47D"); Console.WriteLine("\U00000000"); Console.WriteLine("\U0010FFFF"); // But these don't. // H is not a valid Hex character: // Compilation error (line 16, col 22): Unrecognized escape sequence Console.WriteLine("\U00HHHHHH"); // This is outside the range of 000000 - 10FFFF: // Compilation error (line 19, col 22): Unrecognized escape sequence Console.WriteLine("\U001effff");
As an aside, to properly display Unicode characters in the Windows console, see How to write Unicode characters to the console?.
Answered By – dbc
Answer Checked By – Gilberto Lyons (BugsFixing Admin)