When a specific Unicode UTF-16 code point is referenced, it can be expressed as U+n, where n is 4 to 6 hexadecimal digits. Leading zeros are omitted, unless the code point has fewer than 4 hexadecimal digits. For example, the following values are valid representations of a UTF-16 code point:

U+00001 U+0012 U+0123 U+1234 U+12345 U+123456