H, and octal integers by a trailing B.
E[+|-]nnn, where
[+|-]nnn is the desired exponent. All of the
digits of the floating point constant must be valid decimal (base 10)
digits.
') or double ("). They may
also be expressed by their ordinal value (their ASCII value, usually)
followed by a C.
') or double (").
Escape sequences in the style of C are also allowed. See C and C++ constants, for a brief explanation of escape
sequences.
TRUE and
FALSE.