What are the three valid declarations of a char?

Char c1 = 064770;-2.

Char c3 = 0xbeef;-3.

Char c6 = \ \\uface\ ;

Char c1 = 064770; is an octal representation of the integer value 27128, which is legal because it fits into an unsigned 16-bit integer.

Char c3 = 0xbeef; is a hexadecimal representation of the integer value 48879, which fits into an unsigned 16-bit integer.

Char c6 = \\uface; is a unicode representation of a character.