In computing , the question mark character is represented by ASCII code 63 , and is located at Unicode code-point U +003 F. The full-width ( double-byte ) equivalent , ï 1\/4 , is located at Unicode code point U+FF 1F . In computing , the question mark character is represented by ASCII code 63 ( 0x3F hexadecimal ) , and is located at Unicode code-point U +003 F. The full-width ( double-byte ) equivalent , ï 1\/4 , is located at Unicode code point U+FF 1F .