= Data Types =

''Part of'' TutorialFundamentals

== Description ==

Shows how the `sizeof`, `min`, and `max` properties can reveal the size and possible minimum/maximum values of the data types.


== Example ==

{{{
#!d
import std.stdio;

int main() {
  // Show information about integer types...
  writefln("bool\tmin: %d\tmax: %d (%d)", bool.min, bool.max, bool.sizeof);  
  writefln("ubyte\tmin: %d\tmax: %d (%d)", ubyte.min, ubyte.max, ubyte.sizeof);  
  writefln("ushort\tmin: %d\tmax: %d (%d)", ushort.min, ushort.max, ushort.sizeof);  
  writefln("uint\tmin: %d\tmax: %d (%d)", uint.min, uint.max, uint.sizeof);  
  writefln("ulong\tmin: %d\tmax: %d (%d)\n", ulong.min, ulong.max, ulong.sizeof);    
  writefln("byte\tmin: %d\tmax: %d (%d)", byte.min, byte.max, byte.sizeof);  
  writefln("short\tmin: %d\tmax: %d (%d)", short.min, short.max, short.sizeof);    
  writefln("int\tmin: %d\tmax: %d (%d)", int.min, int.max, int.sizeof);    
  writefln("long\tmin: %d\tmax: %d (%d)\n", long.min, long.max, long.sizeof);    

  // Show information about floating-point types...
  writef("float (%d)\tdouble (%d)\treal (%d)\t", float.sizeof, double.sizeof, real.sizeof);
  writef("ifloat (%d)\tidouble (%d)\tireal (%d)\t", ifloat.sizeof, idouble.sizeof, ireal.sizeof);
  writef("cfloat (%d)\tcdouble (%d)\tcreal (%d)\t", cfloat.sizeof, cdouble.sizeof, creal.sizeof);

  // Show information about character types...
  writef("char (%d)\twchar (%d)\tdchar (%d)\t", char.sizeof, wchar.sizeof, dchar.sizeof);

  return 0;
}
}}}

== Output ==

{{{
bool	min: 0	max: 1 (1)
ubyte	min: 0	max: 255 (1)
ushort	min: 0	max: 65535 (2)
uint	min: 0	max: 4294967295 (4)
ulong	min: 0	max: 18446744073709551615 (8)
byte	min: -128	max: 127 (1)
short	min: -32768	max: 32767 (2)
int	min: -2147483648	max: 2147483647 (4)
long	min: -9223372036854775808	max: 9223372036854775807 (8)
float (4)	double (8)	real (10)	ifloat (4)	idouble (8)
ireal (10)	cfloat (8)	cdouble (16)	creal (20)	cfloat (8)
cdouble (16)	creal (20)	char (1)	wchar (2)	dchar (4)
}}}

== More Information ==

=== Integer Types ===
|| '''Type''' ||	'''Min'''	 || '''Max'''	|| '''Size (bytes)''' ||
|| bool || 	0 	|| 1	|| 1 ||
|| ubyte || 	0 	|| 255	|| 1 ||
|| ushort || 	0 	|| 65,535	|| 2 ||
|| uint || 	0 	|| 4,294,967,295	|| 4 ||
|| ulong ||	0 	|| 18,446,744,073,709,551,615	|| 8 ||
|| byte || 	-128 	|| 127	|| 1 ||
|| short || 	-32,768 || 	32,767	|| 2 ||
|| int || 	-2,147,483,648 	|| 2,147,483,647	|| 4 ||
|| long ||	-9,223,372,036,854,775,808 	|| 9,223,372,036,854,775,807	|| 8 ||

=== Floating-Point Types ===

 * Floating point:
   * float
   * double
   * real
 * Complex and Imaginary:
   * cfloat
   * cdouble
   * creal
 * Complex and Imaginary:
   * ifloat
   * idouble
   * ireal

=== Character Types ===

 * char: unsigned 8 bit (UTF-8)
 * wchar: unsigned 16 bit (UTF-16)
 * dchar: unsigned 32 bit (UTF-32)

The official list is in the [http://www.digitalmars.com/d/type.html D Specification].


== Source ==

Based on [http://jcc_7.tripod.com/d/tutor/types.html types.html] by jcc7.