Intel® Fortran Compiler 17.0 Developer Guide and Reference

Declarations for Noncharacter Types

The following table shows the data types that can appear in noncharacter type declarations.

Noncharacter Data Types

BYTE1

LOGICAL2

LOGICAL([KIND=]1) (or LOGICAL*1)

LOGICAL([KIND=]2) (or LOGICAL*2)

LOGICAL([KIND=]4) (or LOGICAL*4)

LOGICAL([KIND=]8) (or LOGICAL*8)

INTEGER3

INTEGER([KIND=]1) (or INTEGER*1)

INTEGER([KIND=]2) (or INTEGER*2)

INTEGER([KIND=]4) (or INTEGER*4)

INTEGER([KIND=]8) (or INTEGER*8)

REAL4

REAL([KIND=]4) (or REAL*4)

DOUBLE PRECISION (REAL([KIND=]8) or REAL*8)

REAL([KIND=]16) (or REAL*16)

COMPLEX5

COMPLEX([KIND=]4) (or COMPLEX*8)

DOUBLE COMPLEX (COMPLEX([KIND=]8) or COMPLEX*16)

COMPLEX([KIND=]16) (or COMPLEX*32)

1 Same as INTEGER(1).

2 This is treated as default logical.

3 This is treated as default integer.

4 This is treated as default real.

5 This is treated as default complex.

In noncharacter type declarations, you can optionally specify the name of the data object or function as v*n, where n is the length (in bytes) of v. The length specified overrides the length implied by the data type.

The value for n must be a valid length for the type of v. The type specifiers BYTE, DOUBLE PRECISION, and DOUBLE COMPLEX have one valid length, so the n specifier is invalid for them.

For an array specification, the n must be placed immediately following the array name; for example, in an INTEGER declaration, IVEC*2(10) is an INTEGER(2) array of 10 elements.

Note that certain compiler options can affect the defaults for numeric and logical data types.

Examples

In a noncharacter type declaration, a subsequent kind parameter overrides any initial kind parameter. For example, consider the following statements:

INTEGER(KIND=2) I, J, K, M12*4, Q, IVEC*4(10)
REAL(KIND=8) WX1, WXZ, WX3*4, WX5, WX6*4
REAL(KIND=8) PI/3.14159E0/, E/2.72E0/, QARRAY(10)/5*0.0,5*1.0/

In the first statement, M12*4 and IVEC*4 override the KIND=2 specification. In the second statement, WX3*4 and WX6*4 override the KIND=8 specification. In the third statement, QARRAY is initialized with implicit conversion of the REAL(4) constants to a REAL(8) data type.

See Also