ms.date: "4/2/2020"

Size of the destination string buffer in **char** units for narrow and multi-byte functions, and **wchar_t** units for wide functions. This value must be greater than zero and not greater than **RSIZE_MAX**.

ms.date: "05/07/2019"

|**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<br /><br /> 0 to 255 when compiled by using [/J](../build/reference/j-default-char-type-is-unsigned.md)|

|**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](../cpp/int8-int16-int32-int64.md) and [Integer Limits](../cpp/integer-limits.md).

Visual Studio 2017 and later also supports [EditorConfig](https://editorconfig.org/), which works in a similar way. ClangFormat, however, has a more style options than EditorConfig, including rules that are specific to C++. With **EditorConfig**, you create **.editorconfig** files and place them in different folders of your codebase to specify code styles for those folders and their subfolders. An **.editorconfig** file supersedes any other **.editorconfig** files in parent folders and overwrites any formatting settings configured via **Tools** > **Options**. You can set rules for tabs vs. spaces, indent size, and more. For more information, see [Create portable, custom editor settings with EditorConfig](/visualstudio/ide/create-portable-custom-editor-options).