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Showing content from https://learn.microsoft.com/en-us/cpp/cpp/data-type-ranges below:

Data Type Ranges | Microsoft Learn

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 (__), the data type is nonstandard.

The ranges 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 (seven digits) double 8 none 1.7E +/- 308 (fifteen digits) long double same as double none Same as double wchar_t 2 __wchar_t 0 to 65,535

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 4 bytes. However, portable code shouldn't 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.