9.1 ISO_FORTRAN_ENV

Standard:

Fortran 2003 and later; INT8, INT16, INT32, INT64, REAL32, REAL64, REAL128 are Fortran 2008 or later

The ISO_FORTRAN_ENV module provides the following scalar default-integer named constants:

CHARACTER_STORAGE_SIZE:

Size in bits of the character storage unit.

ERROR_UNIT:

Identifies the preconnected unit used for error reporting.

FILE_STORAGE_SIZE:

Size in bits of the file-storage unit.

INPUT_UNIT:

Identifies the preconnected unit identified by the asterisk (*) in READ statement.

INT8, INT16, INT32, INT64

Kind type parameters to specify an INTEGER type with a storage size of 16, 32, and 64 bits. It is negative if a target platform does not support the particular kind.

IOSTAT_END:

The value assigned to the variable passed to the IOSTAT= specifier of an input/output statement if an end-of-file condition occurred.

IOSTAT_EOR:

The value assigned to the variable passed to the IOSTAT= specifier of an input/output statement if an end-of-record condition occurred.

NUMERIC_STORAGE_SIZE:

The size in bits of the numeric storage unit.

OUTPUT_UNIT:

Identifies the preconnected unit identified by the asterisk (*) in WRITE statement.

REAL32, REAL64, REAL128

Kind type parameters to specify a REAL type with a storage size of 32, 64, and 128 bits. It is negative if a target platform does not support the particular kind.