FORTRAN, Data, Constants
*Conan The Librarian
A constant is a fixed value. The value of a constant can be a numeric value, a logical value, or a character string. A constant that has a name is a named constant. A named constant can be of any type, including derived type, and it can be array-valued. A named constant has the PARAMETER attribute and is specified in a type declaration statement or PARAMETER statement. A constant that does not have a name is a literal constant. A literal constant must be of intrinsic type and it cannot be array-valued. There are nine types of literal constants: integer, real, complex, binary, octal, hexadecimal, logical, character, and Hollerith. Binary, octal, hexadecimal, and Hollerith constants have no data type; they assume a data type that conforms to the context in which they are used.
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