kinds.f90 File Reference

Standard KINDS for numeric data types. More...

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Modules
module	kinds

Variables
integer, parameter	kinds::int8 = selected_int_kind(2)
	Very short integer (8 bit, -128 to 127)
integer, parameter	kinds::int16 = selected_int_kind(4)
	Short integer (16 bit, -32 768 to 32 767)
integer, parameter	kinds::int32 = selected_int_kind(9)
	"Normal" integer (32 bit == 4 byte, -2 147 483 648 to 2 147 483 647)
integer, parameter	kinds::int64 = selected_int_kind(15)
	Long integer (64 bit, -9 223 372 036 854 775 808 to 9 223 372 036 854 775 807)
integer, parameter	kinds::real32 = selected_real_kind(6, 37)
	Normal "float" (32 bit = 4 bytes, approx -3.4e38 to 3.4e38 and covering values down to about 1e-38 magnitude)
integer, parameter	kinds::real64 = selected_real_kind(15, 307)
	Longer "double" (64 bit, approx -1.8e308 to 1.8e308 and covering values down to about 2e-308 magnitude)
integer, parameter	kinds::real128 = selected_real_kind(33, 4931)
	Extra long "real" (128 bit = 16 bytes). Few systems have numbers this long at all!

Detailed Description

Standard KINDS for numeric data types.

Code originally written by H. Ratcliffe and C. S. Brady for the Research Software Engineering course delivered as part of the taught component of the EPSRC-supported Centre for Doctoral Training (CDT) in Modelling of Heterogeneous Systems (HetSys) at the University of Warwick. Re-used here with permission.

Original description (verbatim): This module provides the numeric kinds we think you might need, using names that match those in F2008. This makes it smooth to change to std F2008 by simply removing this module.

Do remember that not every length of type has to exist on a particular system - for those which don't you will get AT LEAST the requested length if this does not exceed the longest the system offers.

Author

H. Ratcliffe

C. S. Brady

C. D. Woodgate

Date

2019-2025

Definition in file kinds.f90.