Intel® Fortran Compiler XE 13.1 User and Reference Guides
Binary, octal, hexadecimal, and Hollerith constants are nondecimal constants. They have no intrinsic data type, but assume a numeric data type depending on their use.
Standard Fortran allows unsigned binary, octal, and hexadecimal constants to be used in DATA statements; the constant must correspond to an integer scalar variable.
In Intel® Fortran, binary, octal, hexadecimal, and Hollerith constants can appear wherever numeric constants are allowed.