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Changing a Variable’s Data Type
Type String Language Size Description
$extended C architecturedependent;
often long
double
Extended-precision floatingpoint
number. Extendedprecision
numbers must be
supported by the target
architecture. In addition, the
format of extended floating
point numbers varies depending
on where it's stored. For
example, the x86 register has a
special 10-byte format, which is
different than the in-memory
format. Consult your vendor’s
architecture documentation for
more information.
$float C float Single-precision floating-point
number.
$int C int Integer.
$integer Fortran integer Integer.
$integer_1 Fortran integer*1 One-byte integer.
$integer_2 Fortran integer*2 Two-byte integer.
$integer_4 Fortran integer*4 Four-byte integer.
$integer_8 Fortran integer*8 Eight-byte integer.
$logical Fortran logical Logical.
$logical_1 Fortran logical*1 One-byte logical.
$logical_2 Fortran logical*2 Two-byte logical.
$logical_4 Fortran logical*4 Four-byte logical.
$logical_8 Fortran logical*8 Eight-byte logical.
$long C long Long integer.
$long_long C long long Long long integer.
$real Fortran real Single-precision floating-point
number.
When using a value such as real,
be careful that the actual data
type used by your computer is
not real*4 or real*8, since
different results can occur.
$real_4 Fortran real*4 Four-byte floating-point
number.
$real_8 Fortran real*8 Eight-byte floating-point
number.
$real_16 Fortran real*16 Sixteen-byte floating-point
number.
$short C short Short integer.
$string C char Array of characters.
$void C long Area of memory.
$wchar C platform-specific Platform-specific wide character
used by wchar_t data types
$wchar_s16 C 16 bits wide character whose storage is
signed 16 bits (not currently
used by any platform)
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