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Learn more about: Data Type Ranges
Data Type Ranges
05/28/2020
float keyword [C++]
char keyword [C++]
unsigned long
__wchar_t keyword [C++]
unsigned short int [C++]
enum keyword [C++]
unsigned char keyword [C++]
integer data type [C++], data type ranges
int data type
data types [C++], ranges
unsigned int [C++]
short data type
short int data
signed types [C++], data type ranges
long long keyword [C++]
long double keyword [C++]
double data type [C++], data type ranges
signed short int [C++]
unsigned short
sized integer types
signed int [C++]
signed long int [C++]
signed char keyword [C++]
wchar_t keyword [C++]
long keyword [C++]
ranges [C++]
unsigned types [C++], data type ranges
floating-point numbers [C++]
data type ranges
ranges [C++], data types
long int keyword [C++]
unsigned long int [C++]
3691ceca-05fb-4b82-b1ae-5c4618cda91a

Data Type Ranges

The Microsoft C++ 32-bit and 64-bit compilers recognize the types in the table later in this article.

  • int (unsigned int)

  • __int8 (unsigned __int8)

  • __int16 (unsigned __int16)

  • __int32 (unsigned __int32)

  • __int64 (unsigned __int64)

  • short (unsigned short)

  • long (unsigned long)

  • long long (unsigned long long)

If its name begins with two underscores (__), a data type is non-standard.

The ranges that are specified in the following table are inclusive-inclusive.

Type Name Bytes Other Names Range of Values
int 4 signed -2,147,483,648 to 2,147,483,647
unsigned int 4 unsigned 0 to 4,294,967,295
__int8 1 char -128 to 127
unsigned __int8 1 unsigned char 0 to 255
__int16 2 short, short int, signed short int -32,768 to 32,767
unsigned __int16 2 unsigned short, unsigned short int 0 to 65,535
__int32 4 signed, signed int, int -2,147,483,648 to 2,147,483,647
unsigned __int32 4 unsigned, unsigned int 0 to 4,294,967,295
__int64 8 long long, signed long long -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
unsigned __int64 8 unsigned long long 0 to 18,446,744,073,709,551,615
bool 1 none false or true
char 1 none -128 to 127 by default

0 to 255 when compiled by using /J
signed char 1 none -128 to 127
unsigned char 1 none 0 to 255
short 2 short int, signed short int -32,768 to 32,767
unsigned short 2 unsigned short int 0 to 65,535
long 4 long int, signed long int -2,147,483,648 to 2,147,483,647
unsigned long 4 unsigned long int 0 to 4,294,967,295
long long 8 none (but equivalent to __int64) -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807
unsigned long long 8 none (but equivalent to unsigned __int64) 0 to 18,446,744,073,709,551,615
enum varies none
float 4 none 3.4E +/- 38 (7 digits)
double 8 none 1.7E +/- 308 (15 digits)
long double same as double none Same as double
wchar_t 2 __wchar_t 0 to 65,535

Depending on how it's used, a variable of __wchar_t designates either a wide-character type or multibyte-character type. Use the L prefix before a character or string constant to designate the wide-character-type constant.

signed and unsigned are modifiers that you can use with any integral type except bool. Note that char, signed char, and unsigned char are three distinct types for the purposes of mechanisms like overloading and templates.

The int and unsigned int types have a size of four bytes. However, portable code should not depend on the size of int because the language standard allows this to be implementation-specific.

C/C++ in Visual Studio also supports sized integer types. For more information, see __int8, __int16, __int32, __int64 and Integer Limits.

For more information about the restrictions of the sizes of each type, see Built-in types.

The range of enumerated types varies depending on the language context and specified compiler flags. For more information, see C Enumeration Declarations and Enumerations.

See also

Keywords
Built-in types