x039F
The string "x039F" refers to a specific hexadecimal escape sequence. In many programming languages and data encoding systems, escape sequences are used to represent characters that are difficult or impossible to type directly, or that have special meaning within the context of the encoding. The "x" prefix typically indicates that the following characters are hexadecimal digits. The sequence "039F" represents a hexadecimal value.
When interpreted as a Unicode character, the hexadecimal value 039F corresponds to the Greek capital letter