 The latest C standard (C11) allows multi-national Unicode characters to be embedded portably within C source text by using codice_82 or codice_83 encoding (where the codice_84 denotes a hexadecimal character), although this feature is not yet widely implemented.The basic C execution character set contains the same characters, along with representations for alert, backspace, and carriage return.Run-time support for extended character sets has increased with each revision of the C standard.